add release action

.github/workflows/release.yml

@@ -0,0 +1,27 @@
+name: Release
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  deploy:
+    name: Tag if new release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      - name: Read version number
+        id: read_toml
+        uses: outcome-co/[email protected]
+        with:
+          path: Cargo.toml
+          key: package.version
+      - name: Set tag env variable
+        run: echo IMAGE_TAG=v${{steps.read_toml.outputs.package_version}} >> $GITHUB_ENV
+      - uses: ncipollo/release-action@v1
+        continue-on-error: true
+        with:
+          allowUpdates: false
+          tag: ${{ env.IMAGE_TAG }}
+          token: ${{ secrets.GITHUB_TOKEN }}