Initial commit: MOPC platform with Docker deployment setup

Full Next.js 15 platform with tRPC, Prisma, PostgreSQL, NextAuth.
Includes production Dockerfile (multi-stage, port 7600), docker-compose
with registry-based image pull, Gitea Actions CI workflow, nginx config
for portal.monaco-opc.com, deployment scripts, and DEPLOYMENT.md guide.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/lib/prisma.ts

@@ -0,0 +1,16 @@
+import { PrismaClient } from '@prisma/client'
+
+const globalForPrisma = globalThis as unknown as {
+  prisma: PrismaClient | undefined
+}
+
+export const prisma =
+  globalForPrisma.prisma ??
+  new PrismaClient({
+    log:
+      process.env.NODE_ENV === 'development'
+        ? ['query', 'error', 'warn']
+        : ['error'],
+  })
+
+if (process.env.NODE_ENV !== 'production') globalForPrisma.prisma = prisma