Fix arm/v7 build hang problem

.github/workflows/publish-ghcr.yaml

@@ -31,13 +31,10 @@ jobs:
       - name: Publish to GHCR
         uses: docker/build-push-action@v4
         with:
+          context: .
+          file: ./Dockerfile
           platforms: linux/amd64,linux/arm/v7,linux/arm64
           tags: |
             ghcr.io/${{ github.repository }}:${{ github.sha }}
             ghcr.io/${{ github.repository }}:${{ steps.package-version.outputs.current-version }}
             ghcr.io/${{ github.repository }}:latest
-
-      # - name: Publish to GHCR
-      #   run: echo ${{ secrets.GITHUB_TOKEN }} | docker login ghcr.io -u ${{ github.actor }} --password-stdin
-      # - run: docker build -t ghcr.io/${{ github.repository }}:latest .
-      # - run: docker push ghcr.io/${{ github.repository }}:latest

Dockerfile

@@ -1,4 +1,6 @@
-FROM node:20-alpine
+# Docker builds hang in arm/v7 images, so we use Node 18 to build and Node 20 to run
+# Cf. https://github.com/docker/build-push-action/issues/1071
+FROM node:18-alpine AS BUILD_IMAGE
 WORKDIR /app
 RUN apk add --no-cache python3 build-base
 ADD package.json pnpm-lock.yaml /app/
@@ -8,5 +10,10 @@ COPY . /app/
 # Always exit 0 here because TSC will fail while we're migrating to TypeScript but
 # not everything uses TypeScript
 RUN pnpm run build; exit 0
+
+# Now we run the app
+FROM node:20-alpine
 ENV NODE_ENV=production
+WORKDIR /app
+COPY --from=BUILD_IMAGE /app/dist /app/dist
 CMD ["node", "dist/start.js"]