feat: add Docker support with PostgreSQL and health check endpoint

src/app/api/health/route.ts

@@ -0,0 +1,27 @@
+import { NextResponse } from "next/server";
+import { prisma } from "@/lib/prisma";
+
+export async function GET() {
+  try {
+    // Check database connection
+    await prisma.$queryRaw`SELECT 1`;
+    
+    return NextResponse.json({
+      status: "healthy",
+      database: "connected",
+      timestamp: new Date().toISOString(),
+    });
+  } catch (error) {
+    console.error("Health check failed:", error);
+    
+    return NextResponse.json(
+      {
+        status: "unhealthy",
+        database: "disconnected",
+        error: "Database connection failed",
+        timestamp: new Date().toISOString(),
+      },
+      { status: 503 }
+    );
+  }
+}