Only build arm64 image and tag using github actions

.github/workflows/build-code.yml

@@ -2,7 +2,6 @@ name: Build code
 
 on:
   workflow_dispatch:
-  pull_request:
 
 jobs:
   build:

.github/workflows/docker-image.yml

@@ -21,9 +21,7 @@ jobs:
         with:
           images: grobut939/ghostfolio
           tags: |
-            type=ref,event=pr
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=arm64
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
@@ -43,7 +41,7 @@ jobs:
         uses: docker/build-push-action@v3
         with:
           context: .
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/arm64
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.output.labels }}