supply github token for test

Author: Patrick Poetz

.github/workflows/main.yml

@@ -1,23 +1,24 @@
-name: Test Docker Image Creation
-
+name: Test GPR Push
 on: [push]
 
 jobs:
-
   build:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout
+
+      - name: Copy Repo Files
         uses: actions/checkout@v1
         with:
           fetch-depth: 1
-      - name: Build and Publish Docker image in GPR
+      - name: Publish Docker Image to GPR
         uses: saubermacherag/gpr-docker-publish@master
         with:
           IMAGE_NAME: 'gpr-docker-publish-test'
-          TAG: 'v0.0'
+          TAG: 'my-optional-tag-name'
           DOCKERFILE_PATH: '.github/docker/Dockerfile'
           BUILD_CONTEXT: '.'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: Build and Publish Docker image to Dockerhub instead of GPR
         uses: saubermacherag/gpr-docker-publish@master
         with: