Use docker buildx for building and pushing images

This has the benefit that every tag only shows up as one image. With goreleaser, multiple images were shipped

.github/workflows/release.yml

@@ -1,9 +1,9 @@
-name: goreleaser
+name: release
 
 on:
   push:
     tags:
-      - '*'
+      - 'v*'
 
 jobs:
   goreleaser:
@@ -16,6 +16,18 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
+      -
+        name: Docker meta
+        id: meta
+        uses: crazy-max/ghaction-docker-meta@v2
+        with:
+          images: |
+            1password/onepassword-operator
+          # Publish image for x.y.z and x.y
+          # The latest tag is automatically added for semver tags
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v1
@@ -29,15 +41,14 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       -
-        name: Set up Go
-        uses: actions/setup-go@v2
+        name: Build and push
+        uses: docker/build-push-action@v2
         with:
-          go-version: 1.15
-      -
-        name: Run GoReleaser
-        uses: goreleaser/goreleaser-action@v2
-        with:
-          version: latest
-          args: release --rm-dist
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          context: .
+          file: Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            operator_version=${{ github.event.ref }}

Dockerfile

@@ -14,8 +14,6 @@ COPY vendor/ vendor/
 # Build
 ARG operator_version=dev
 RUN CGO_ENABLED=0 \
-    GOOS=linux \
-    GOARCH=amd64 \
     GO111MODULE=on \
     go build \
     -ldflags "-X version.Version=$operator_version" \