Allow docker build from branch

Author: stefanspiska

.github/workflows/build-multiarch-image-next.yml

@@ -10,11 +10,26 @@ on:
       - 'tests/**'
   repository_dispatch:
     types: [ build-ehrbase-next ]
-
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: tag for the image
+        required: true
 jobs:
   build-docker:
     runs-on: ubuntu-20.04
     steps:
+      - name: Calculate tag
+        run: |
+          if [ -z "${{ github.event.inputs.tag }}" ]
+          then
+          v='next'
+          else
+          v=${{ github.event.inputs.tag }}
+          fi
+          echo "build tag ${v}"
+          # Set as Environment for all further steps 
+          echo "TAG=${v}" >> $GITHUB_ENV
       - name: Checkout
         uses: actions/checkout@v2
 
@@ -33,26 +48,27 @@ jobs:
           context: .
           platforms: linux/amd64
           push: true
-          tags: ehrbase/ehrbase:next-amd64
+          tags: ehrbase/ehrbase:${{env.TAG}}-amd64
 
       - name: Build and push (ARM64)
         uses: docker/build-push-action@v2
         with:
           context: .
           platforms: linux/arm64
           push: true
-          tags: ehrbase/ehrbase:next-arm64
+          tags: ehrbase/ehrbase:${{env.TAG}}-arm64
 
       - name: Create and push MultiArch Manifest
         run: |
+
           docker buildx imagetools create \
-                 ehrbase/ehrbase:next-arm64 \
-                 ehrbase/ehrbase:next-amd64 \
-                 -t ehrbase/ehrbase:next
-          docker pull ehrbase/ehrbase:next
+                 ehrbase/ehrbase:${{env.TAG}}-arm64 \
+                 ehrbase/ehrbase:${{env.TAG}}-amd64 \
+                 -t ehrbase/ehrbase:${{env.TAG}}
+          docker pull ehrbase/ehrbase:${{env.TAG}}
 
       - name: Inspect MultiArch Manifest
-        run: docker manifest inspect ehrbase/ehrbase:next
+        run: docker manifest inspect ehrbase/ehrbase:${{env.TAG}}