Improve docker file (#1)

Reviewed-on: http://git.sothink.vn/tungdt/cosmos-prototype-application/pulls/1

Dockerfile

@@ -1,39 +1,32 @@
-# Base image
-FROM node:22-alpine AS builder
+# Stage 1: Build
+FROM node:18-slim AS builder
 
-ARG NODE_ENV=production
-ARG MONGODB_URI
-ARG MONGODB_DB
-
-# Create app directory
 WORKDIR /app
 
-# Install dependencies
-COPY package.json package-lock.json* ./
-RUN npm ci
+# Copy dependencies first to cache better
+COPY package.json package-lock.json ./
+RUN npm install
 
-# Copy the rest of the application
+# Copy all source code
 COPY . .
 
-# Build the app
+# Build the Next.js app
 RUN npm run build
 
-# Production image
-FROM node:22-alpine AS runner
+
+# Stage 2: Run production image
+FROM node:18-slim
 
 WORKDIR /app
 
-# Copy only necessary files
-COPY --from=builder /app/package.json ./
+COPY --from=builder /app/package.json /app/package-lock.json ./
+RUN npm install --omit=dev
+
 COPY --from=builder /app/.next .next
-COPY --from=builder /app/public ./public
-COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/public public
 COPY --from=builder /app/next.config.ts ./
+COPY --from=builder /app/src src
 
-# Set environment variables (optional)
-
-# Expose port
 EXPOSE 3000
 
-# Start the application
-CMD ["npm", "start"]
+CMD ["npx", "next", "start"]