chore(docker): add Dockerfiles and docker-compose for frontend and backend

- Add frontend Dockerfile with multi-stage build using node and nginx
- Add backend Dockerfile with multi-stage build to compile and serve app
- Add docker-compose.yml to define frontend and backend services with environment variables
- Configure nginx to serve SPA, enable gzip compression and caching for static assets
- Set up nginx reverse proxy for API requests to backend service on /api path

server/Dockerfile

@@ -0,0 +1,32 @@
+# Backend Dockerfile
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+
+# Install dependencies
+RUN npm ci
+
+# Copy source code
+COPY . .
+
+# Build TypeScript
+RUN npm run build
+
+# Production stage
+FROM node:20-alpine
+
+WORKDIR /app
+
+# Copy package files and install production deps only
+COPY package*.json ./
+RUN npm ci --only=production
+
+# Copy built code
+COPY --from=builder /app/dist ./dist
+
+EXPOSE 3001
+
+CMD ["node", "dist/index.js"]