feat: add Docker deployment configuration

- Add server Dockerfile with multi-stage build
- Add frontend Dockerfile with Nginx
- Add docker-compose.yml for orchestration
- Add Nginx config with SSL support
- Add deployment documentation

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

packages/server/Dockerfile

@@ -0,0 +1,43 @@
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Install pnpm
+RUN npm install -g pnpm
+
+# Copy workspace files
+COPY pnpm-workspace.yaml package.json pnpm-lock.yaml ./
+COPY packages/shared ./packages/shared
+COPY packages/server ./packages/server
+
+# Install dependencies
+RUN pnpm install --frozen-lockfile
+
+# Build shared package first
+WORKDIR /app/packages/shared
+RUN pnpm build
+
+# Build server
+WORKDIR /app/packages/server
+RUN pnpm build
+
+# Production stage
+FROM node:20-alpine AS production
+
+WORKDIR /app
+
+RUN npm install -g pnpm
+
+# Copy built files
+COPY --from=builder /app/packages/server/dist ./dist
+COPY --from=builder /app/packages/server/package.json ./
+COPY --from=builder /app/packages/shared /app/packages/shared
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/packages/server/node_modules ./packages/server/node_modules
+
+ENV NODE_ENV=production
+ENV PORT=3000
+
+EXPOSE 3000
+
+CMD ["node", "dist/index.js"]