fix(build): update PostgreSQL to 17 for Alpine 3.23, add Forgejo Actions CI

- Alpine 3.23 (in serversideup/php:8.4-fpm-nginx-alpine) ships pg17, not pg15
- Add .forgejo/workflows/build.yml for automated image builds on push to mapledeploy

.forgejo/workflows/build.yml

@@ -0,0 +1,41 @@
+name: Build MapleDeploy Coolify Image
+
+on:
+  push:
+    branches: [mapledeploy]
+    paths-ignore:
+      - "*.md"
+      - ".github/**"
+      - "templates/**"
+
+env:
+  REGISTRY: forgejo.mapledeploy.ca
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Get version
+        id: version
+        run: |
+          VERSION=$(docker run --rm -v "$PWD:/app" -w /app php:8.2-alpine3.16 php bootstrap/getVersion.php)
+          echo "VERSION=${VERSION}" >> "$GITHUB_OUTPUT"
+          echo "Building version: ${VERSION}"
+
+      - name: Login to Forgejo registry
+        run: |
+          echo "${{ secrets.FORGEJO_TOKEN }}" | docker login ${{ env.REGISTRY }} -u ${{ github.repository_owner }} --password-stdin
+
+      - name: Build image
+        run: |
+          docker build -f docker/production/Dockerfile \
+            -t ${{ env.REGISTRY }}/${{ github.repository }}:${{ steps.version.outputs.VERSION }} \
+            -t ${{ env.REGISTRY }}/${{ github.repository }}:latest \
+            .
+
+      - name: Push image
+        run: |
+          docker push ${{ env.REGISTRY }}/${{ github.repository }}:${{ steps.version.outputs.VERSION }}
+          docker push ${{ env.REGISTRY }}/${{ github.repository }}:latest