Add an example of a smaller alpine image without npm/yarn

docs/BestPractices.md

@@ -204,3 +204,42 @@ FROM node:alpine as app
 ## Copy built node modules and binaries without including the toolchain
 COPY --from=builder node_modules .
 ```
+
+
+## Smaller images without npm/yarn
+
+If you want to achieve an even smaller image size than the `-alpine`, you can omit the npm/yarn like this:
+
+```Dockerfile
+FROM node:18-alpine3.16 AS builder
+WORKDIR /build-stage
+COPY package*.json ./
+RUN npm ci
+
+# Copy the the files you need
+COPY . ./
+
+RUN npm run build
+
+
+# Make sure the alpine version is the same as in the build stage
+FROM alpine:3.16
+RUN apk add --no-cache libstdc++
+RUN apk add --no-cache dumb-init
+RUN addgroup -g 1000 node && adduser -u 1000 -G node -s /bin/sh -D node
+
+COPY --from=builder /usr/local/bin/node /usr/local/bin/
+COPY --from=builder /usr/local/bin/docker-entrypoint.sh /usr/local/bin/
+ENTRYPOINT ["docker-entrypoint.sh"]
+
+# Update the following lines based on your codebase
+COPY --from=builder /build-stage/node_modules ./node_modules
+COPY --from=builder /build-stage/dist ./dist
+
+RUN chown -R node:node ./
+USER node
+# Run with dumb-init to not start node with PID=1, since Node.js was not designed to run as PID 1 
+CMD ["dumb-init", "node", "dist/index.js"]
+```
+
+