feat: custom postgres images

.github/workflows/postgres.yml

@@ -0,0 +1,39 @@
+name: Postgres image
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - "v*"
+
+env:
+  MINOR_VERSIONS: '{"15": "10","17": "2"}'
+
+jobs:
+  buildAndPush:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        postgres_major:
+          - "15"
+          - "17"
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Login to container registry
+        uses: docker/login-action@v3
+        with:
+          registry: code.icb4dc0.de
+          username: prskr
+          password: ${{ secrets.RELEASE_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          file: postgres/Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: code.icb4dc0.de/prskr/supabase-operator/postgres:${{ matrix.postgres_major }}.${{ fromJSON(env.MINOR_VERSIONS)[matrix.postgres_major] }}.${{ github.run_number }}
+          build-args: |
+            POSTGRES_MAJOR=${{ matrix.postgres_major }}
+            POSTGRES_MINOR=${{ fromJSON(env.MINOR_VERSIONS)[matrix.postgres_major] }}