feat: Uses env vars to set selected docker platforms for build

.github/workflows/ci.yml

@@ -492,6 +492,8 @@ jobs:
       - test-rosetta-cli-construction
       - test-rosetta-cli-data
       - test-tokens
+    env:
+      DOCKER_PLATFORMS: linux/amd64
     steps:
       - uses: actions/checkout@v2
         with:
@@ -557,9 +559,7 @@ jobs:
         run: |
           if [ ${{ steps.semantic.outputs.new_release_version }} ]
           then
-            echo "::set-output name=platforms::linux/amd64,linux/arm/v7,linux/arm64/v8"
-          else
-            echo "::set-output name=platforms::linux/amd64"
+            echo "DOCKER_PLATFORMS=linux/amd64,linux/arm/v7,linux/arm64/v8" >> $GITHUB_ENV
           fi
 
       - name: Build/Tag/Push Image
@@ -568,9 +568,7 @@ jobs:
           context: .
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          platforms: ${{ steps.docker_platforms.outputs.platforms }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+          platforms: ${{ env.DOCKER_PLATFORMS }}
           # Only push if (there's a new release on main branch, or if building a non-main branch) and (Only run on non-PR events or only PRs that aren't from forks)
           push: ${{ (github.ref != 'refs/heads/master' || steps.semantic.outputs.new_release_version != '') && (github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository) }}