Add items needed to create Docker image

.github/workflows/publishdocker-branch.yml

@@ -0,0 +1,17 @@
+name: Publish Docker Branch
+on: [push]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Publish to Registry
+      uses: elgohr/Publish-Docker-Github-Action@master
+      env:
+        VERSION: ${{ github.sha }}
+      with:
+        name: wreave/tautulli
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+        dockerfile: Dockerfile
+        buildargs: VERSION