diff --git a/Dockerfile b/Dockerfile
index 7b39d80..2686e83 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,44 +13,61 @@ RUN ln -sf /usr/bin/python3 /usr/bin/python
 # Copy all files
 COPY . .
 
-# Use npm install instead of npm ci to avoid the bug
+# Install all dependencies (workspaces)
 RUN npm install
 
 # Build backend first
 RUN npm run build --workspace=backend
 
-# Build frontend
-RUN npm run build --workspace=frontend
+# Build frontend with specific workaround for Rollup
+RUN cd frontend && npx vite build
 
 # Verify Python and OR-Tools installation
 RUN python -c "from ortools.sat.python import cp_model; print('OR-Tools installed successfully')"
 
-# Production stage - same as above
+# Production stage
 FROM node:20-bookworm
 
 WORKDIR /app
 
+# Install PM2 for process management
 RUN npm install -g pm2
 
+# Create data directory for SQLite database with proper permissions
 RUN mkdir -p /app/data
 
+# Copy backend built files
 COPY --from=builder /app/backend/dist/ ./dist/
 COPY --from=builder /app/backend/package*.json ./
+
+# COPY DATABASE FILES - FIXED
+COPY --from=builder /app/backend/src/database/ ./dist/database/
+COPY --from=builder /app/backend/src/database/ ./database/
+
+# Copy only production dependencies
 COPY --from=builder /app/node_modules/ ./node_modules/
+
+# Copy frontend built files
 COPY --from=builder /app/frontend/dist/ ./frontend-build/
+
+# Copy PM2 configuration
 COPY --from=builder /app/ecosystem.config.cjs ./
 
+# Create a non-root user and group - DEBIAN STYLE
 RUN groupadd -g 1001 nodejs && \
     useradd -m -u 1001 -s /bin/bash -g nodejs schichtplan && \
     chown -R schichtplan:nodejs /app && \
     chmod 755 /app && \
     chmod 775 /app/data
 
+# Set PM2 to use app directory instead of home directory
 ENV PM2_HOME=/app/.pm2
+
 USER schichtplan
+
 EXPOSE 3002
 
 HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
   CMD wget --no-verbose --tries=1 --spider http://localhost:3002/api/health || exit 1
-  
+
 CMD ["pm2-runtime", "ecosystem.config.cjs"]
\ No newline at end of file
diff --git a/frontend/package.json b/frontend/package.json
index 04d70ca..ef971f3 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -9,6 +9,7 @@
     "react-router-dom": "^6.28.0"
   },
   "devDependencies": {
+    "@types/node": "20.19.23",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
     "@types/react-router-dom": "^5.3.3",
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..4c8283e
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,3129 @@
+{
+  "name": "schichtenplaner-monorepo",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "schichtenplaner-monorepo",
+      "workspaces": [
+        "frontend",
+        "backend",
+        "premium"
+      ],
+      "devDependencies": {
+        "typescript": "^5.3.3"
+      }
+    },
+    "backend": {
+      "name": "schichtplan-backend",
+      "version": "1.0.0",
+      "dependencies": {
+        "@types/bcrypt": "^6.0.0",
+        "bcrypt": "^6.0.0",
+        "bcryptjs": "^2.4.3",
+        "cors": "^2.8.5",
+        "express": "^4.18.2",
+        "jsonwebtoken": "^9.0.2",
+        "sqlite3": "^5.1.6",
+        "uuid": "^9.0.0"
+      },
+      "devDependencies": {
+        "@types/bcryptjs": "^2.4.2",
+        "@types/cors": "^2.8.13",
+        "@types/express": "^4.17.17",
+        "@types/jest": "^29.5.0",
+        "@types/jsonwebtoken": "^9.0.2",
+        "@types/uuid": "^9.0.2",
+        "ts-node": "^10.9.0",
+        "tsx": "^4.0.0",
+        "typescript": "^5.0.0"
+      }
+    },
+    "backend/node_modules/@cspotcode/source-map-support": {
+      "version": "0.8.1",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/trace-mapping": "0.3.9"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "backend/node_modules/@esbuild/win32-x64": {
+      "version": "0.25.11",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "backend/node_modules/@gar/promisify": {
+      "version": "1.1.3",
+      "license": "MIT",
+      "optional": true
+    },
+    "backend/node_modules/@jest/expect-utils": {
+      "version": "29.7.0",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "jest-get-type": "^29.6.3"
+      },
+      "engines": {
+        "node": "^14.15.0 || ^16.10.0 || >=18.0.0"
+      }
+    },
+    "backend/node_modules/@jest/schemas": {
+      "version": "29.6.3",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@sinclair/typebox": "^0.27.8"
+      },
+      "engines": {
+        "node": "^14.15.0 || ^16.10.0 || >=18.0.0"
+      }
+    },
+    "backend/node_modules/@jest/types": {
+      "version": "29.6.3",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jest/schemas": "^29.6.3",
+        "@types/istanbul-lib-coverage": "^2.0.0",
+        "@types/istanbul-reports": "^3.0.0",
+        "@types/node": "*",
+        "@types/yargs": "^17.0.8",
+        "chalk": "^4.0.0"
+      },
+      "engines": {
+        "node": "^14.15.0 || ^16.10.0 || >=18.0.0"
+      }
+    },
+    "backend/node_modules/@jridgewell/trace-mapping": {
+      "version": "0.3.9",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/resolve-uri": "^3.0.3",
+        "@jridgewell/sourcemap-codec": "^1.4.10"
+      }
+    },
+    "backend/node_modules/@npmcli/fs": {
+      "version": "1.1.1",
+      "license": "ISC",
+      "optional": true,
+      "dependencies": {
+        "@gar/promisify": "^1.0.1",
+        "semver": "^7.3.5"
+      }
+    },
+    "backend/node_modules/@npmcli/move-file": {
+      "version": "1.1.2",
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "mkdirp": "^1.0.4",
+        "rimraf": "^3.0.2"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "backend/node_modules/@sinclair/typebox": {
+      "version": "0.27.8",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@tootallnate/once": {
+      "version": "1.1.2",
+      "license": "MIT",
+      "optional": true,
+      "engines": {
+        "node": ">= 6"
+      }
+    },
+    "backend/node_modules/@tsconfig/node10": {
+      "version": "1.0.11",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@tsconfig/node12": {
+      "version": "1.0.11",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@tsconfig/node14": {
+      "version": "1.0.3",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@tsconfig/node16": {
+      "version": "1.0.4",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@types/bcrypt": {
+      "version": "6.0.0",
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
+    "backend/node_modules/@types/bcryptjs": {
+      "version": "2.4.6",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@types/body-parser": {
+      "version": "1.19.6",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/connect": "*",
+        "@types/node": "*"
+      }
+    },
+    "backend/node_modules/@types/connect": {
+      "version": "3.4.38",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
+    "backend/node_modules/@types/cors": {
+      "version": "2.8.19",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
+    "backend/node_modules/@types/express": {
+      "version": "4.17.23",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/body-parser": "*",
+        "@types/express-serve-static-core": "^4.17.33",
+        "@types/qs": "*",
+        "@types/serve-static": "*"
+      }
+    },
+    "backend/node_modules/@types/express-serve-static-core": {
+      "version": "4.19.7",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*",
+        "@types/qs": "*",
+        "@types/range-parser": "*",
+        "@types/send": "*"
+      }
+    },
+    "backend/node_modules/@types/http-errors": {
+      "version": "2.0.5",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@types/istanbul-lib-coverage": {
+      "version": "2.0.6",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@types/istanbul-lib-report": {
+      "version": "3.0.3",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/istanbul-lib-coverage": "*"
+      }
+    },
+    "backend/node_modules/@types/istanbul-reports": {
+      "version": "3.0.4",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/istanbul-lib-report": "*"
+      }
+    },
+    "backend/node_modules/@types/jest": {
+      "version": "29.5.14",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "expect": "^29.0.0",
+        "pretty-format": "^29.0.0"
+      }
+    },
+    "backend/node_modules/@types/jsonwebtoken": {
+      "version": "9.0.10",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/ms": "*",
+        "@types/node": "*"
+      }
+    },
+    "backend/node_modules/@types/mime": {
+      "version": "1.3.5",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@types/ms": {
+      "version": "2.1.0",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@types/node": {
+      "version": "24.7.0",
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~7.14.0"
+      }
+    },
+    "backend/node_modules/@types/qs": {
+      "version": "6.14.0",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@types/range-parser": {
+      "version": "1.2.7",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@types/send": {
+      "version": "1.2.0",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
+    "backend/node_modules/@types/serve-static": {
+      "version": "1.15.9",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/http-errors": "*",
+        "@types/node": "*",
+        "@types/send": "<1"
+      }
+    },
+    "backend/node_modules/@types/serve-static/node_modules/@types/send": {
+      "version": "0.17.5",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/mime": "^1",
+        "@types/node": "*"
+      }
+    },
+    "backend/node_modules/@types/stack-utils": {
+      "version": "2.0.3",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@types/uuid": {
+      "version": "9.0.8",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/@types/yargs": {
+      "version": "17.0.33",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/yargs-parser": "*"
+      }
+    },
+    "backend/node_modules/@types/yargs-parser": {
+      "version": "21.0.3",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/abbrev": {
+      "version": "1.1.1",
+      "license": "ISC",
+      "optional": true
+    },
+    "backend/node_modules/accepts": {
+      "version": "1.3.8",
+      "license": "MIT",
+      "dependencies": {
+        "mime-types": "~2.1.34",
+        "negotiator": "0.6.3"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "backend/node_modules/acorn": {
+      "version": "8.15.0",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "acorn": "bin/acorn"
+      },
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
+    "backend/node_modules/acorn-walk": {
+      "version": "8.3.4",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "acorn": "^8.11.0"
+      },
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
+    "backend/node_modules/agent-base": {
+      "version": "6.0.2",
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "debug": "4"
+      },
+      "engines": {
+        "node": ">= 6.0.0"
+      }
+    },
+    "backend/node_modules/agentkeepalive": {
+      "version": "4.6.0",
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "humanize-ms": "^1.2.1"
+      },
+      "engines": {
+        "node": ">= 8.0.0"
+      }
+    },
+    "backend/node_modules/aggregate-error": {
+      "version": "3.1.0",
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "clean-stack": "^2.0.0",
+        "indent-string": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "backend/node_modules/ansi-regex": {
+      "version": "5.0.1",
+      "license": "MIT",
+      "optional": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "backend/node_modules/ansi-styles": {
+      "version": "4.3.0",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "color-convert": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
+    "backend/node_modules/aproba": {
+      "version": "2.1.0",
+      "license": "ISC",
+      "optional": true
+    },
+    "backend/node_modules/are-we-there-yet": {
+      "version": "3.0.1",
+      "license": "ISC",
+      "optional": true,
+      "dependencies": {
+        "delegates": "^1.0.0",
+        "readable-stream": "^3.6.0"
+      },
+      "engines": {
+        "node": "^12.13.0 || ^14.15.0 || >=16.0.0"
+      }
+    },
+    "backend/node_modules/arg": {
+      "version": "4.1.3",
+      "dev": true,
+      "license": "MIT"
+    },
+    "backend/node_modules/array-flatten": {
+      "version": "1.1.1",
+      "license": "MIT"
+    },
+    "backend/node_modules/balanced-match": {
+      "version": "1.0.2",
+      "license": "MIT",
+      "optional": true
+    },
+    "backend/node_modules/base64-js": {
+      "version": "1.5.1",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT"
+    },
+    "backend/node_modules/bcrypt": {
+      "version": "6.0.0",
+      "hasInstallScript": true,
+      "license": "MIT",
+      "dependencies": {
+        "node-addon-api": "^8.3.0",
+        "node-gyp-build": "^4.8.4"
+      },
+      "engines": {
+        "node": ">= 18"
+      }
+    },
+    "backend/node_modules/bcrypt/node_modules/node-addon-api": {
+      "version": "8.5.0",
+      "license": "MIT",
+      "engines": {
+        "node": "^18 || ^20 || >= 21"
+      }
+    },
+    "backend/node_modules/bcryptjs": {
+      "version": "2.4.3",
+      "license": "MIT"
+    },
+    "backend/node_modules/bindings": {
+      "version": "1.5.0",
+      "license": "MIT",
+      "dependencies": {
+        "file-uri-to-path": "1.0.0"
+      }
+    },
+    "backend/node_modules/bl": {
+      "version": "4.1.0",
+      "license": "MIT",
+      "dependencies": {
+        "buffer": "^5.5.0",
+        "inherits": "^2.0.4",
+        "readable-stream": "^3.4.0"
+      }
+    },
+    "backend/node_modules/body-parser": {
+      "version": "1.20.3",
+      "license": "MIT",
+      "dependencies": {
+        "bytes": "3.1.2",
+        "content-type": "~1.0.5",
+        "debug": "2.6.9",
+        "depd": "2.0.0",
+        "destroy": "1.2.0",
+        "http-errors": "2.0.0",
+        "iconv-lite": "0.4.24",
+        "on-finished": "2.4.1",
+        "qs": "6.13.0",
+        "raw-body": "2.5.2",
+        "type-is": "~1.6.18",
+        "unpipe": "1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.8",
+        "npm": "1.2.8000 || >= 1.4.16"
+      }
+    },
+    "backend/node_modules/body-parser/node_modules/debug": {
+      "version": "2.6.9",
+      "license": "MIT",
+      "dependencies": {
+        "ms": "2.0.0"
+      }
+    },
+    "backend/node_modules/body-parser/node_modules/iconv-lite": {
+      "version": "0.4.24",
+      "license": "MIT",
+      "dependencies": {
+        "safer-buffer": ">= 2.1.2 < 3"
+      },
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
+    "backend/node_modules/body-parser/node_modules/ms": {
+      "version": "2.0.0",
+      "license": "MIT"
+    },
+    "backend/node_modules/brace-expansion": {
+      "version": "1.1.12",
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
+    "backend/node_modules/braces": {
+      "version": "3.0.3",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "fill-range": "^7.1.1"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "backend/node_modules/buffer": {
+      "version": "5.7.1",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.1.13"
+      }
+    },
+    "backend/node_modules/buffer-equal-constant-time": {
+      "version": "1.0.1",
+      "license": "BSD-3-Clause"
+    },
+    "backend/node_modules/bytes": {
+      "version": "3.1.2",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "backend/node_modules/cacache": {
+      "version": "15.3.0",
+      "license": "ISC",
+      "optional": true,
+      "dependencies": {
+        "@npmcli/fs": "^1.0.0",
+        "@npmcli/move-file": "^1.0.1",
+        "chownr": "^2.0.0",
+        "fs-minipass": "^2.0.0",
+        "glob": "^7.1.4",
+        "infer-owner": "^1.0.4",
+        "lru-cache": "^6.0.0",
+        "minipass": "^3.1.1",
+        "minipass-collect": "^1.0.2",
+        "minipass-flush": "^1.0.5",
+        "minipass-pipeline": "^1.2.2",
+        "mkdirp": "^1.0.3",
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