added nos workflows & dockerfile

.github/workflows/nosportugal-docker-build.yml

@@ -0,0 +1,66 @@
+name: Docker build push (GCP)
+
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+    inputs:
+      image-tag:
+        description: The tag to build the docker image
+        required: true
+        type: string
+
+env:
+  REGISTRY: europe-west1-docker.pkg.dev
+  IMAGE_NAME: mergeable
+
+jobs:
+  docker-build-to-gar:
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    permissions:
+      contents: 'read'
+      id-token: 'write'
+    strategy:
+      matrix:
+        env: [staging, prod]
+    environment: ${{ matrix.env }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: docker/setup-buildx-action@v2
+
+      - uses: docker/metadata-action@v4
+        id: meta
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          images: |
+            ${{ env.REGISTRY }}/${{ secrets.GCP_REPOSITORY_PATH }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=sha,format=long
+            type=raw,value=${{ inputs.image-tag }}
+          flavor: |
+            latest=auto
+
+      - id: auth
+        uses: google-github-actions/auth@v2
+        with:
+          token_format: "access_token"
+          workload_identity_provider: ${{ secrets.GCP_WORKLOAD_IDENTITY_PROVIDER_ID }}
+          service_account: ${{ secrets.GCP_SERVICE_ACCOUNT }}
+          access_token_lifetime: '100s'
+
+      - uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: oauth2accesstoken
+          password: ${{ steps.auth.outputs.access_token }}
+
+      - uses: docker/build-push-action@v3
+        with:
+          file: nos.Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

nos.Dockerfile

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+FROM node:lts-alpine
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci --only=production
+
+COPY . .
+
+ENV PORT=${PORT:-3000}
+USER 1000:1000
+
+CMD ./node_modules/probot/bin/probot.js run --port $PORT ./index.js