make deployment easier (#225)

Dockerfile

@@ -0,0 +1,74 @@
+FROM node:20-alpine AS base
+
+# Install dependencies only when needed
+FROM base AS deps
+# Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
+RUN apk add --no-cache libc6-compat
+WORKDIR /app
+
+# Install root dependencies
+COPY package.json package-lock.json* ./
+RUN npm ci
+
+# Install frontend dependencies
+WORKDIR /app/frontend
+COPY frontend/package.json frontend/package-lock.json* ./
+RUN npm ci
+
+# Install backend dependencies
+WORKDIR /app/backend
+COPY backend/package.json backend/package-lock.json* ./
+RUN npm ci
+
+# Build frontend
+FROM base AS frontend-builder
+WORKDIR /app
+
+COPY package.json ./
+COPY --from=deps /app/node_modules ./node_modules
+COPY --from=deps /app/frontend/node_modules ./frontend/node_modules
+COPY frontend ./frontend
+
+WORKDIR /app/frontend
+RUN npm run build
+
+# Final production image
+FROM base AS runner
+WORKDIR /app
+
+ENV NODE_ENV=production
+ENV PORT=8000
+ENV FRONTEND_ORIGIN=http://localhost:8000
+
+# Create a non-root user
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+
+# Copy backend files
+COPY backend ./backend
+
+# Copy frontend build
+COPY --from=frontend-builder /app/frontend/.next/standalone ./
+COPY --from=frontend-builder /app/frontend/.next/static ./.next/static
+COPY --from=frontend-builder /app/frontend/public ./public
+
+# Copy Next.js module for the server
+COPY --from=deps /app/frontend/node_modules/next ./node_modules/next
+
+# Install backend dependencies directly in the container to ensure native modules are built correctly
+WORKDIR /app/backend
+COPY backend/package.json backend/package-lock.json* ./
+RUN npm ci
+WORKDIR /app
+
+# Copy custom combined_server.js that combines frontend and backend
+COPY combined_server.js ./
+
+# Switch to non-root user
+USER nextjs
+
+# Expose the port
+EXPOSE 8000
+
+# Run database migrations and start the combined server
+CMD ["node", "combined_server.js"]