Add production Docker deployment configuration

- Add multi-stage Dockerfile for Next.js standalone build
- Add docker-compose.deploy.yml for production deployment
- Add entrypoint.sh for database migration and startup
- Add .dockerignore for efficient Docker builds
- Add docker/.env.production with all required env vars
- Add Caddyfile.prod with security headers and optimizations
- Update next.config.ts with output: standalone for Docker
- Add DOCKER_DEPLOYMENT.md with comprehensive deployment guide

Dockerfile

@@ -0,0 +1,57 @@
+# Multi-stage build for Next.js monorepo
+FROM node:22-alpine AS base
+RUN corepack enable pnpm
+WORKDIR /app
+
+# Install dependencies stage
+FROM base AS deps
+RUN apk add --no-cache libc6-compat
+COPY pnpm-lock.yaml pnpm-workspace.yaml package.json ./
+RUN pnpm install --frozen-lockfile --prod
+
+# Build stage
+FROM base AS builder
+RUN apk add --no-cache libc6-compat postgresql-client
+COPY pnpm-lock.yaml pnpm-workspace.yaml package.json ./
+RUN pnpm install --frozen-lockfile
+
+# Copy source code
+COPY . .
+
+# Build the app
+RUN pnpm build
+
+# Production runtime
+FROM base AS runtime
+RUN apk add --no-cache libc6-compat postgresql-client
+ENV NODE_ENV production
+
+# Copy production node_modules
+COPY --from=deps /app/node_modules ./node_modules
+
+# Copy built Next.js app
+COPY --from=builder /app/apps/web/.next/standalone ./
+
+# Copy public assets
+COPY --from=builder /app/apps/web/public ./public
+
+# Copy workspace packages (needed for migrations)
+COPY --from=builder /app/packages ./packages
+
+# Copy root package.json for pnpm monorepo
+COPY package.json pnpm-workspace.yaml pnpm-lock.yaml ./
+
+# Create non-root user
+RUN addgroup -g 1001 -S nodejs && adduser -S nextjs -u 1001
+
+# Copy entrypoint script
+COPY docker/entrypoint.sh /app/entrypoint.sh
+RUN chmod +x /app/entrypoint.sh
+
+USER nextjs
+
+EXPOSE 3000
+
+ENV PORT 3000
+
+CMD ["/app/entrypoint.sh"]