Optimized Dockerfile to produce a smaller and faster build

docker/Dockerfile

@@ -1,53 +1,60 @@
 # Stage 1: Build frontend
-FROM --platform=$BUILDPLATFORM node:18 AS frontend-builder
+FROM --platform=$BUILDPLATFORM node:18-alpine AS frontend-builder
 WORKDIR /app
 COPY package*.json ./
-RUN npm install
+RUN npm ci --only=production
 COPY . .
 RUN npm run build
 
 # Stage 2: Build backend
-FROM --platform=$BUILDPLATFORM node:18 AS backend-builder
+FROM --platform=$BUILDPLATFORM node:18-alpine AS backend-builder
 WORKDIR /app
 COPY package*.json ./
-RUN npm install
+RUN npm ci --only=production
 COPY src/backend/ ./src/backend/
 
-# Stage 3: Final production image
+# Stage 3: Build bcrypt for the target platform
-FROM mongo:4.4
+FROM --platform=$TARGETPLATFORM node:18-alpine AS bcrypt-builder
-# Install Node.js
+WORKDIR /app
-RUN apt-get update && apt-get install -y \
+COPY package*.json ./
-    curl \
+RUN apk add --no-cache python3 make g++ \
-    nginx \
+    && npm ci --only=production bcrypt \
-    python3 \
+    && rm -rf /root/.npm
-    build-essential \
-    && curl -fsSL https://deb.nodesource.com/setup_18.x | bash - \
-    && apt-get install -y nodejs \
-    && apt-get clean \
-    && rm -rf /var/lib/apt/lists/*
 
-# Configure nginx
+# Stage 4: Final production image
+FROM mongo:4.4-focal
+# Install Node.js and nginx, cleanup in the same layer
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    nginx \
+    curl \
+    && curl -fsSL https://deb.nodesource.com/setup_18.x | bash - \
+    && apt-get install -y --no-install-recommends nodejs \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* \
+    && rm -rf /var/cache/apt/*
+
+# Configure nginx and copy frontend
 COPY docker/nginx.conf /etc/nginx/nginx.conf
 COPY --from=frontend-builder /app/dist /usr/share/nginx/html
 
-# Setup backend
+# Setup backend with pre-built bcrypt
 WORKDIR /app
 COPY package*.json ./
-RUN npm install --omit=dev
+RUN npm ci --only=production --ignore-scripts
+COPY --from=bcrypt-builder /app/node_modules/bcrypt /app/node_modules/bcrypt
 COPY --from=backend-builder /app/src/backend ./src/backend
 
-# Create directories for MongoDB and nginx
+# Create necessary directories and set permissions
-RUN mkdir -p /data/db && \
+RUN mkdir -p /data/db /var/log/{nginx,mongodb} /var/lib/nginx \
-    mkdir -p /var/log/nginx && \
+    && chown -R mongodb:mongodb /data/db /var/log/mongodb \
-    mkdir -p /var/lib/nginx && \
+    && chown -R www-data:www-data /var/log/nginx /var/lib/nginx \
-    mkdir -p /var/log/mongodb && \
+    && rm -rf /root/.npm /tmp/*
-    chown -R mongodb:mongodb /data/db /var/log/mongodb && \
-    chown -R www-data:www-data /var/log/nginx /var/lib/nginx
 
 # Set environment variables
 ENV MONGO_URL=mongodb://localhost:27017/termix \
     MONGODB_DATA_DIR=/data/db \
-    MONGODB_LOG_DIR=/var/log/mongodb
+    MONGODB_LOG_DIR=/var/log/mongodb \
+    NODE_ENV=production
 
 # Create volume for MongoDB data
 VOLUME ["/data/db"]
@@ -55,7 +62,7 @@ VOLUME ["/data/db"]
 # Expose ports
 EXPOSE 8080 8081 8082 27017
 
-# Use a entrypoint script to run all services
+# Copy and set entrypoint
 COPY docker/entrypoint.sh /entrypoint.sh
 RUN chmod +x /entrypoint.sh
 CMD ["/entrypoint.sh"]