Add label-custom input (#35)

Co-authored-by: CrazyMax <crazy-max@users.noreply.github.com>

.github/CONTRIBUTING.md

@@ -2,7 +2,8 @@
 
 Hi there! We're thrilled that you'd like to contribute to this project. Your help is essential for keeping it great.
 
-Contributions to this project are [released](https://help.github.com/articles/github-terms-of-service/#6-contributions-under-repository-license) to the public under the [project's open source license](LICENSE).
+Contributions to this project are [released](https://help.github.com/articles/github-terms-of-service/#6-contributions-under-repository-license)
+to the public under the [project's open source license](LICENSE).
 
 ## Submitting a pull request
 
@@ -16,21 +17,6 @@ Contributions to this project are [released](https://help.github.com/articles/gi
 8. Push to your fork and [submit a pull request](https://github.com/crazy-max/ghaction-docker-meta/compare)
 9. Pat your self on the back and wait for your pull request to be reviewed and merged.
 
-## Container based developer flow
-
-If you don't want to maintain a Node developer environment that fits this project you can use containerized commands instead of invoking yarn directly.
-
-```
-# format code and build javascript artifacts
-docker buildx bake pre-checkin
-
-# validate all code has correctly formatted and built
-docker buildx bake validate
-
-# run tests
-docker buildx bake test
-```
-
 Here are a few things you can do that will increase the likelihood of your pull request being accepted:
 
 - Write tests.

.github/workflows/ci.yml

@@ -105,6 +105,25 @@ jobs:
             {{major}}.{{minor}}.{{patch}}
           tag-latest: ${{ matrix.tag-latest }}
 
+  label-custom:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Docker meta
+        uses: ./
+        with:
+          images: |
+            ${{ env.DOCKER_IMAGE }}
+            ghcr.io/name/app
+          label-custom: |
+            maintainer=CrazyMax
+            org.opencontainers.image.title=MyCustomTitle
+            org.opencontainers.image.description=Another description
+            org.opencontainers.image.vendor=MyCompany
+
   docker-push:
     runs-on: ubuntu-latest
     services: