Add release workflow

Author: kentakozuka

.github/workflows/release.yaml

@@ -0,0 +1,21 @@
+name: release
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'RELEASE'
+
+jobs:
+  gh-release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - run: |
+          gh release create "$(cat RELEASE | sed -r 's/^version: (.+)$/\1/')" --generate-notes
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ISSUE: ${{ github.event.issue.html_url }}

.go-version

@@ -0,0 +1 @@
+1.18.2

RELEASE

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+version: v0.0.1