Add Docker buildx GitHub workflow

.github/workflows/publish-release.yml

@@ -0,0 +1,28 @@
+name: Publish Release
+on:
+  push:
+    tags: [v*]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@master
+      - name: Get Release Version
+        run: echo ::set-env name=RELEASE_VERSION::${GITHUB_REF#refs/tags/}
+      - name: Get Changelog
+        run: echo ::set-env name=CHANGELOG::"$( sed -n '/^## /{p; :loop n; p; /^## /q; b loop}' CHANGELOG.md | sed '$d' | sed '$d' | sed '$d' | sed ':a;N;$!ba;s/\n/%0A/g' )"
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ env.RELEASE_VERSION }}
+          release_name: Tautulli ${{ env.RELEASE_VERSION }}
+          body: |
+            ## Changelog
+            
+            ##${{ env.CHANGELOG }}
+          draft: false
+          prerelease: ${{ endsWith(env.RELEASE_VERSION, '-beta') }}