ci: Move creation of Nginx image to separate workflow

.github/workflows/create-nginx.yaml

@@ -0,0 +1,58 @@
+name: Create Nginx image
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'docker/**/nginx/**'
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: 2martens/docker-nginx
+
+jobs:
+  create-nginx:
+    name: Build Nginx image
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      attestations: write
+      id-token: write
+    strategy:
+      matrix:
+        env: [ test ]
+    environment: ${{ matrix.env }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Perform docker login
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=raw,value=${{ matrix.env }}
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Build & push Nginx image to GHCR
+        id: push
+        uses: docker/build-push-action@v6
+        with:
+          platforms: linux/amd64,linux/arm64
+          context: docker/${{ matrix.env }}/nginx
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+      - name: Attest
+        uses: actions/attest-build-provenance@v2
+        id: attest
+        with:
+          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          subject-digest: ${{ steps.push.outputs.digest }}

.github/workflows/deploy.yaml

@@ -31,72 +31,11 @@ jobs:
         id: detect
         run: |
           echo "changed_envs=$(git diff --name-only ${{ github.event.before }} ${{ github.sha }} | grep '^docker/' | cut -d/ -f2 | sort -u | tr '\n' ' ')" >> "$GITHUB_OUTPUT"
-  create-nginx:
-    name: Build Nginx image
-    runs-on: ubuntu-latest
-    needs: fact-finding
-    permissions:
-      contents: read
-      packages: write
-      attestations: write
-      id-token: write
-    strategy:
-      matrix:
-        env: [ test ]
-    environment: ${{ matrix.env }}
-    steps:
-      - uses: actions/checkout@v4
-      - name: Exit if this environment wasn't changed
-        id: check
-        run: |
-          echo "Changed envs: '${{ needs.fact-finding.outputs.changed_envs }}'"
-          if [[ (${{ github.event_name }} == 'workflow_dispatch' && "${{ github.event.inputs.deploy }}" == 'true') || "${{ needs.fact-finding.outputs.changed_envs }}" =~ "${{ matrix.env }}" ]]; then
-            echo "should_deploy=true" >> $GITHUB_OUTPUT
-          else
-            echo "should_deploy=false" >> $GITHUB_OUTPUT
-          fi
-        shell: bash
-      - name: Perform docker login
-        if: steps.check.outputs.should_deploy == 'true'
-        uses: docker/login-action@v3
-        with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Extract metadata (tags, labels) for Docker
-        id: meta
-        if: steps.check.outputs.should_deploy == 'true'
-        uses: docker/metadata-action@v5
-        with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
-          tags: |
-            type=raw,value=${{ matrix.env }}
-      - name: Set up Docker Buildx
-        if: steps.check.outputs.should_deploy == 'true'
-        uses: docker/setup-buildx-action@v3
-      - name: Build & push Nginx image to GHCR
-        id: push
-        if: steps.check.outputs.should_deploy == 'true'
-        uses: docker/build-push-action@v6
-        with:
-          platforms: linux/amd64,linux/arm64
-          context: docker/${{ matrix.env }}/nginx
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-      - name: Attest
-        if: steps.check.outputs.should_deploy == 'true'
-        uses: actions/attest-build-provenance@v2
-        id: attest
-        with:
-          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
-          subject-digest: ${{ steps.push.outputs.digest }}
   deploy:
     name: Deploy
     runs-on: ubuntu-latest
     needs:
       - fact-finding
-      - create-nginx
     strategy:
       matrix:
         env: [ test ]