feat: add multi-platform docker image support (#19)

This commit adds support for multi-platform docker images. It includes changes to the CI workflow file to setup QEMU and Docker Buildx, login to Docker Hub, and build and push the docker image for both amd64 and arm64 platforms.

Future improvements
Use node:18-bullseye-slim instead of node:18-bullseye, the image is half the size (compressed). Potential problem: "npm ci" (on arm64 at least) requires node-gyp requires python, so it must be installed first ("half the size" is only without python...).

.github/workflows/ci.yml

@@ -42,5 +42,6 @@ jobs:
       - name: Build and push
         uses: docker/build-push-action@v3
         with:
-          push: true
+          push: ${{ github.ref == 'refs/heads/main' }}
           tags: streamr/stream-metrics-index:latest
+          platforms: linux/amd64,linux/arm64

Dockerfile

@@ -6,7 +6,7 @@ RUN npm run build
 RUN chmod +x dist/bin/*.js
 RUN rm -rf node_modules
 
-FROM node:18-bullseye-slim
+FROM node:18-bullseye
 USER node
 WORKDIR /usr/src/app
 COPY --chown=node:node --from=build /usr/src/app/ .

package.json

@@ -4,6 +4,8 @@
   "private": true,
   "scripts": {
     "build": "tsc -b tsconfig.build.json",
+    "docker:build": "docker build --tag streamr/stream-metrics-index:latest .",
+    "docker:push": "docker buildx build --platform linux/amd64,linux/arm64 --tag streamr/stream-metrics-index:latest --push .",
     "test": "jest --runInBand",
     "eslint": "eslint --cache --cache-location=node_modules/.cache/.eslintcache/ '*/**/*.{js,ts}'"
   },