[SOURCEFROG] Added dockerhub sync step

Author: strobsi

.github/workflows/dockerhub-description.yml

@@ -0,0 +1,20 @@
+name: Docker Hub Sync
+on:
+  push:
+    paths:
+      - docs/docker.md
+      - .github/workflows/dockerhub-description.yml
+# Jobs
+jobs:
+  docker-sync:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@master
+
+      - uses: meeDamian/[email protected]
+        with:
+          user: ${{ secrets.DOCKER_USERNAME }}
+          pass: ${{ secrets.DOCKER_PASSWORD }}
+          readme: ./docs/docker.md
+          description: true
+          slug: sourcefrog/cicd

docs/docker.md

@@ -0,0 +1,11 @@
+# CICD Example Repository
+
+For detailed information check out the [README](https://github.com/source-frog/CI-CD/blob/master/README.md)
+
+## How to use this image
+
+The image already contains the compiled ionic progressive web app within nginx. You can use it by:
+
+```
+docker run -p 5000:80 sourcefrog/cicd:latest
+```