chore: add release please (#15)

* chore: add release please

* Update package.json

* chore: add publish step

* chore: add prerelease

Author: ascorbic

.github/workflows/pre-release.yml

@@ -0,0 +1,45 @@
+name: prerelease
+on:
+  push:
+    branches:
+      # releases/<tag>/<version>
+      - releases/*/*
+jobs:
+  prerelease:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: "*"
+          cache: "npm"
+          check-latest: true
+          registry-url: "https://registry.npmjs.org"
+      - name: Install core dependencies
+        run: npm ci --no-audit
+      - name: Extract tag and version
+        id: extract
+        run: |-
+          ref=${{ github.ref }}
+          branch=${ref:11}
+          tag_version=${branch:9}
+          tag=${tag_version%/*}
+          version=${tag_version##*/}
+          echo "::set-output name=tag::${tag}"
+          echo "::set-output name=version::${version}"
+      - name: Log versions
+        run: |-
+          echo tag=${{ steps.extract.outputs.tag }}
+          echo version=${{ steps.extract.outputs.version }}
+      - name: Setup git user
+        run: git config --global user.name github-actions
+      - name: Setup git email
+        run: git config --global user.email github-actions@github.com
+      - name: Run npm version
+        run: npm version ${{ steps.extract.outputs.version }}-${{ steps.extract.outputs.tag }} --allow-same-version
+      - name: Push changes
+        run: git push --follow-tags
+      - name: Run npm publish
+        run: npm publish --tag=${{ steps.extract.outputs.tag }}
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}

.github/workflows/release-please.yml

@@ -0,0 +1,33 @@
+name: release-please
+on:
+  push:
+    branches:
+      - main
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: navikt/github-app-token-generator@a9cd374e271b8aef573b8c16ac46c44fb89b02db
+        id: get-token
+        with:
+          private-key: ${{ secrets.TOKENS_PRIVATE_KEY }}
+          app-id: ${{ secrets.TOKENS_APP_ID }}
+      - uses: GoogleCloudPlatform/release-please-action@v2
+        id: release
+        with:
+          token: ${{ steps.get-token.outputs.token }}
+          release-type: node
+          package-name: "gatsby-plugin-netlify"
+      - uses: actions/checkout@v2
+        if: ${{ steps.release.outputs.release_created }}
+      - uses: actions/setup-node@v2
+        with:
+          node-version: "*"
+          cache: "npm"
+          check-latest: true
+          registry-url: "https://registry.npmjs.org"
+        if: ${{ steps.release.outputs.release_created }}
+      - run: npm publish
+        if: ${{ steps.release.outputs.release_created }}
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}