Improve cacheability

Dockerfile

@@ -1,22 +1,38 @@
-FROM node:lts-alpine
+################################################
+FROM node:lts-alpine AS base
+
+# Create user and group
+RUN mkdir /app && \
+    addgroup -g 1001 -S nodejs && \
+    adduser -S nodejs -u 1001 && \
+    chown -R nodejs:nodejs /app
+
+WORKDIR /app
+
+################################################
+FROM base AS build
 
 # Create app directory and copy the app
-WORKDIR /app
-COPY . .
-
-# Run as non-root user
-RUN addgroup -g 1001 -S nodejs
-RUN adduser -S nodejs -u 1001
-RUN chown -R nodejs:nodejs /app
-USER nodejs
+COPY package*.json tsconfig.json ./
 
 # Install
 RUN npm install
 
+# Copy the app
+COPY src ./src
+
 # Build
 RUN npm run build
 
+################################################
+FROM node:lts-alpine
+
+COPY --from=build /app/package*.json ./
+COPY --from=build /app/dist ./dist
+
+# Install dependencies but skip dev dependencies
+RUN npm install --only=production
+
 # Start the app
 ENTRYPOINT ["npm", "run"]
-CMD ["start"]
-
+CMD ["start"]