added init files

backend/tsconfig.json

@@ -0,0 +1,20 @@
+// backend/tsconfig.json
+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "ESNext",
+    "moduleResolution": "node",
+    "ignoreDeprecations": "6.0",
+    "allowSyntheticDefaultImports": true,
+    "esModuleInterop": true,
+    "allowJs": true,
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "strict": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}