fix: update PrismaService constructor to use correct datasource format and include prisma.config.ts in Dockerfile

backend/tsconfig.json

@@ -17,5 +17,6 @@
     "strictBindCallApply": false,
     "forceConsistentCasingInFileNames": false,
     "noFallthroughCasesInSwitch": false
-  }
+  },
+  "exclude": ["node_modules", "prisma.config.ts"]
 }