add working dir for docker builds

.gitea/actions/docker/action.yml

@@ -28,6 +28,9 @@ inputs:
   TAG_LATEST:
     description: "Also tag and push the image as latest"
     default: "false"
+  WORKING_DIRECTORY:
+    description: "Working directory for the Docker build"
+    default: "."
 
 runs:
   using: composite
@@ -52,7 +55,7 @@ runs:
         if [ "${{ inputs.TAG_LATEST }}" = "true" ]; then
           TAGS="$TAGS -t ${{ inputs.IMAGE_PATH }}:latest"
         fi
-        docker buildx build -f Dockerfile . \
+        docker buildx build -f ${{ inputs.WORKING_DIRECTORY }}/Dockerfile ${{ inputs.WORKING_DIRECTORY }} \
           --platform ${{ inputs.PLATFORMS }} \
           --push \
           $TAGS