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

Dockerfile

@@ -0,0 +1,29 @@
+# Frontend 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 the app
+RUN npm run build
+
+# Production stage
+FROM nginx:alpine
+
+# Copy built assets
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+# Copy nginx config
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+
+CMD ["nginx", "-g", "daemon off;"]