Add Publish Snap GitHub workflow

.github/workflows/publish-snap.yml

@@ -0,0 +1,53 @@
+name: Publish Snap
+
+on:
+  push:
+    branches: [master, beta, nightly]
+    tags: [v*]
+
+jobs:
+  build-docker:
+    name: Build Snap Package
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v2
+
+      - name: Prepare
+        id: prepare
+        run: |
+          git fetch --prune --unshallow --tags
+          if [[ $GITHUB_REF == refs/tags/*-beta ]]; then
+            echo ::set-output name=RELEASE::beta
+          elif [[ $GITHUB_REF == refs/tags/* ]]; then
+            echo ::set-output name=RELEASE::stable
+          else
+            echo ::set-output name=RELEASE::edge
+          fi
+
+      - name: Build Snap Package
+        uses: snapcore/action-build@v1
+        id: build
+
+      - name: Upload Snap Package
+        uses: actions/upload-artifact@v2
+        with:
+          name: Tautulli-snap-package
+          path: ${{ steps.build.outputs.snap }}
+
+      - name: Publish Snap Package
+        if: startsWith(github.ref, 'refs/tags/')
+        uses: snapcore/action-publish@v1
+        with:
+          store_login: ${{ secrets.SNAP_LOGIN }}
+          snap: ${{ steps.build.outputs.snap }}
+          release: ${{ steps.prepare.outputs.RELEASE }}
+
+      - name: Post Status to Discord
+        uses: sarisia/actions-status-discord@v1
+        if: always()
+        with:
+          webhook: ${{ secrets.DISCORD_WEBHOOK }}
+          status: ${{ job.status }}
+          title: ${{ github.workflow }}
+          nofail: true