implement last CI workflows

.github/workflows/release-please.yaml

@@ -0,0 +1,23 @@
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: write
+  pull-requests: write
+
+name: release-please
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: googleapis/release-please-action@v4
+        with:
+          # this assumes that you have created a personal access token
+          # (PAT) and configured it as a GitHub action secret named
+          # `MY_RELEASE_PLEASE_TOKEN` (this secret name is not important).
+          token: ${{ secrets.MY_RELEASE_PLEASE_TOKEN }}
+          # this is a built-in strategy in release-please, see "Action Inputs"
+          # for more options
+          release-type: simple

.github/workflows/update-api-version.yaml

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+name: Update Version and Release
+on:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: write
+
+jobs:
+  update-version:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Extract latest version from CHANGELOG.md
+        id: get_version
+        run: |
+          VERSION=$(grep -oP '\[\K[0-9]+\.[0-9]+\.[0-9]+' CHANGELOG.md | head -1)
+          echo "::set-output name=VERSION::$VERSION"
+
+      - name: Update version in cmd/api/main.go
+        run: |
+          sed -i "s/var version = \".*\"/var version = \"${{ steps.get_version.outputs.VERSION }}\"/" cmd/api/main.go
+
+      - name: Commit and push if changed
+        run: |
+          git config --global user.email "action@github.com"
+          git config --global user.name "GitHub Action"
+          git add cmd/api/main.go
+          git commit -m "Update version to ${{ steps.get_version.outputs.VERSION }}" || echo "No changes to commit"
+          git push