feat: migrate backend to cosmiconfig

backend/backend/tsconfig.json

@@ -2,9 +2,7 @@
   "extends": "@openstapps/tsconfig",
   "compilerOptions": {
     "resolveJsonModule": true,
-    "skipLibCheck": true,
     "useUnknownInCatchVariables": false,
-    "lib": ["ES2020"]
-  },
-  "exclude": ["./config/", "./test"]
+    "allowJs": true
+  }
 }