fix: fix multi platform go build in docker push workflow

.github/workflows/docker.yml

@@ -14,6 +14,13 @@ on:
 
 permissions:
   contents: read
+  packages: write
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
 
 jobs:
   build:
@@ -23,43 +30,34 @@ jobs:
         with:
           fetch-depth: 0
 
-      - name: Prepare
-        id: prep
-        run: |
-          DOCKER_IMAGE=interchainio/simapp
-          VERSION=noop
-          if [[ $GITHUB_REF == refs/tags/* ]]; then
-            VERSION=${GITHUB_REF#refs/tags/}
-          elif [[ $GITHUB_REF == refs/heads/* ]]; then
-            VERSION=$(echo ${GITHUB_REF#refs/heads/} | sed -r 's#/+#-#g')
-            if [ "${{ github.event.repository.default_branch }}" = "$VERSION" ]; then
-              VERSION=latest
-            fi
-          fi
-          TAGS="${DOCKER_IMAGE}:${VERSION}"
-          if [[ $VERSION =~ ^v[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
-            TAGS="$TAGS,${DOCKER_IMAGE}:${VERSION}"
-          fi
-          echo ::set-output name=version::${VERSION}
-          echo ::set-output name=tags::${TAGS}
-          echo ::set-output name=created::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=semver,pattern={{version}}
+            type=semver,pattern=latest-{{major}}.{{minor}}
+          flavor: |
+            latest=false
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
-
-      - name: Login to DockerHub
+      - name: Log into registry ${{ env.REGISTRY }}
         if: ${{ github.event_name != 'pull_request' }}
         uses: docker/login-action@v2
         with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Publish to Docker Hub
+      - name: Publish to GitHub Packages
         uses: docker/build-push-action@v3
         with:
           platforms: linux/amd64,linux/arm64
           push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.prep.outputs.tags }}
+          tags: ${{ steps.meta.outputs.tags }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

@@ -10,7 +10,7 @@
 # > docker run -it -p 26657:26657 -p 26656:26656 -v ~/.simappcli:/root/.simapp simapp simd keys add foo
 # > docker run -it -p 26657:26657 -p 26656:26656 -v ~/.simappcli:/root/.simapp simapp simd keys list
 # TODO: demo connecting rest-server (or is this in server now?)
-FROM golang:1.19-alpine AS build-env
+FROM --platform=$BUILDPLATFORM golang:1.19-alpine AS build-env
 
 # Install minimum necessary dependencies
 ENV PACKAGES curl make git libc-dev bash gcc linux-headers eudev-dev python3
@@ -22,8 +22,12 @@ WORKDIR /go/src/github.com/cosmos/cosmos-sdk
 # Add source files
 COPY . .
 
+# Dockerfile Cross-Compilation Guide
+# https://www.docker.com/blog/faster-multi-platform-builds-dockerfile-cross-compilation-guide
+ARG TARGETOS TARGETARCH
+
 # install simapp, remove packages
-RUN make build
+RUN GOOS=$TARGETOS GOARCH=$TARGETARCH make build
 
 
 # Final image