feat: pass input dockerfile

.forgejo/actions/build-docker/action.yml

@@ -7,6 +7,9 @@ inputs:
   password:
     description: Registry Password
     required: true
+  dockerfile:
+    description: The Dockerfile to build
+    required: false
 runs:
   using: composite
   steps:
@@ -22,3 +25,4 @@ runs:
         image: ${{ inputs.username }}/${{ env.IMAGE_NAME }}:${{ github.sha }},${{ inputs.username }}/${{ env.IMAGE_NAME }}:latest
         username: ${{ inputs.username }}
         password: ${{ inputs.password }}
+        dockerfile: ${{ inputs.dockerfile }}