Set up release action

.github/workflows/main.yaml

@@ -0,0 +1,23 @@
+name: release workflow
+on:
+  push:
+    tags:
+      - 'v*'
+jobs:
+  build:
+    name: release action
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - uses: actions/setup-go@v1
+      with:
+        go-version: '1.12'
+    - name: build binaries
+      run: |
+        make release
+    - name: populate release
+      uses: softprops/action-gh-release@v1
+      with:
+        files: irel-*-amd64*
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -163,3 +163,6 @@ If this repository isn't quite what you're looking for, try:
 * [kbld](https://github.com/k14s/kbld) (also based on ggcr)
 * [k8s container image promoter](https://github.com/kubernetes-sigs/k8s-container-image-promoter) (also based on ggcr)
 
+## Development
+
+To create a release on github, simply push a tag beginning with "v".