add ter-release github action

.github/workflows/ter-release.yml

@@ -0,0 +1,34 @@
+name: TER release
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  ter-release:
+    name: TER release
+    runs-on: ubuntu-latest
+    env:
+      TYPO3_EXTENSION_KEY: 'filecollection_gallery'
+      REPOSITORY_URL: 'https://github.com/WapplerSystems/t3-filecollection-gallery'
+      TYPO3_API_TOKEN: ${{ secrets.TYPO3_API_TOKEN }}
+      TYPO3_API_USERNAME: ${{ secrets.TYPO3_API_USERNAME }}
+      TYPO3_API_PASSWORD: ${{ secrets.TYPO3_API_PASSWORD }}
+
+    steps:
+      - name: Get the version
+        id: get_version
+        run: echo ::set-output name=VERSION::${GITHUB_REF/refs\/tags\//}
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '7.4'
+          extensions: intl, mbstring, xml, soap, zip, curl
+
+      - name: Install EXT:tailor
+        run: composer global require typo3/tailor --prefer-dist --no-progress --no-suggest
+
+      - name: Upload EXT:${{ env.EXTENSION_KEY }} as ${{ steps.get_version.outputs.VERSION }} to TER
+        run: php ~/.composer/vendor/bin/tailor ter:publish ${{ steps.get_version.outputs.VERSION }} --artefact=${{ env.REPOSITORY_URL }}/archive/${{ steps.get_version.outputs.VERSION }}.zip --comment="New release of version ${{ steps.get_version.outputs.VERSION }} - see details, changelog and documentation on ${{ env.REPOSITORY_URL }}"