ci: setup release workflow

.github/workflows/release.yml

@@ -0,0 +1,30 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - v*
+
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
+jobs:
+  push:
+    permissions:
+      contents: write
+      id-token: write
+    if: github.repository == 'ackama/aws_ec2_environment'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@v2
+        with:
+          egress-policy: audit
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.2'
+          bundler-cache: true
+      - uses: rubygems/release-gem@v1