ci: migrate release from docker hub into github container registry

.github/workflows/release.yml

@@ -0,0 +1,84 @@
+name: pre-release
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - v*
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: setup go environment
+        uses: actions/setup-go@v1
+        with:
+          go-version: '1.15.4'
+      - name: download dependencies
+        run: make bootstrap
+      - name: run unit tests
+        run: make test
+      - name: build binary
+        run: make build-linux
+      - name: run acceptance tests
+        run: sudo pip install virtualenv && make acceptance
+      - name: Prepare
+        id: prepare
+        run: |
+          DOCKER_IMAGE=ghcr.io/helm/chartmuseum
+          DOCKER_PLATFORMS=linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/386
+          VERSION=pre
+
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF#refs/tags/v}
+          fi
+
+          if [ "${{ github.event_name }}" = "schedule" ]; then
+            VERSION=nightly
+          fi
+
+          TAGS="--tag ${DOCKER_IMAGE}:${VERSION}"
+
+          echo ::set-output name=docker_image::${DOCKER_IMAGE}
+          echo ::set-output name=version::${VERSION}
+          echo ::set-output name=buildx_args::--platform ${DOCKER_PLATFORMS} \
+            --build-arg revision=$(git rev-parse --short HEAD) \
+            ${TAGS} .
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+      -
+        name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          version: latest
+      -
+        name: Available platforms
+        run: echo ${{ steps.buildx.outputs.platforms }}
+      - name: Docker Buildx (build)
+        run: |
+          docker buildx build --no-cache --pull --output "type=image,push=false" ${{ steps.prepare.outputs.buildx_args }}
+      - name: Docker Login
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ secrets.CR_USER_SCBIZU }}
+          password: ${{ secrets.CR_PAT_SCBIZU }}
+      - name: Docker Buildx (push)
+        if: always()
+        run: |
+          docker buildx build --output "type=image,push=true" ${{ steps.prepare.outputs.buildx_args }}
+      - name: Docker Check Manifest
+        if: always()
+        run: |
+          docker run --rm mplatform/mquery ${{ steps.prepare.outputs.docker_image }}:${{ steps.prepare.outputs.version }}
+      - name: Clear
+        if: always()
+        run: |
+          rm -f ${HOME}/.docker/config.json