support defining custom tag

action.yml

@@ -14,6 +14,9 @@ inputs:
   docker-image:
     description: 'Docker Image'
     required: true
+  docker-custom-tag:
+    description: 'Docker Custom Tag'
+    required: false
   docker-username:
     description: 'Username for the Docker Registry'
     required: false
@@ -90,7 +93,12 @@ runs:
       shell: bash
       run: |
         BUILD="true"
-        if [[ $GITHUB_REF == refs/heads/master ]]; then
+        if [[ -n "${{ inputs.docker-custom-tag }}" ]]; then
+          TAG="${{ inputs.docker-custom-tag }}"
+          LATEST="latest"
+          PUSH="true"
+          BUILD="${{ inputs.docker-disable-retagging }}"
+        elif [[ $GITHUB_REF == refs/heads/master ]]; then
           TAG="master-${GITHUB_SHA::8}"
           LATEST="master"
           PUSH="true"