feat(workflows): add support for building and pushing development Docker images on pull requests

.gitea/workflows/docker.yml

@@ -5,13 +5,16 @@ on:
     push:
         tags:
             - "*"
+    pull_request:
 
 env:
     REGISTRY: git.quad4.io
     IMAGE_NAME: rns-things/meshchatx
+    DEV_IMAGE_NAME: rns-things/meshchatx-dev
 
 jobs:
     build:
+        if: github.event_name != 'pull_request'
         runs-on: ubuntu-latest
         permissions:
             contents: read
@@ -63,3 +66,51 @@ jobs:
                   push: true
                   tags: ${{ steps.meta.outputs.tags }}
                   labels: ${{ steps.meta.outputs.labels }}
+
+    build-dev:
+        if: github.event_name == 'pull_request'
+        runs-on: ubuntu-latest
+        permissions:
+            contents: read
+            packages: write
+
+        steps:
+            - name: Checkout repository
+              uses: https://git.quad4.io/actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+              with:
+                  fetch-depth: 0
+
+            - name: Set up QEMU
+              uses: https://git.quad4.io/actions/setup-qemu-action@c7c53464625b32c7a7e944ae62b3e17d2b600130 # v3.7.0
+              with:
+                  platforms: amd64,arm64
+
+            - name: Set up Docker Buildx
+              uses: https://git.quad4.io/actions/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0
+
+            - name: Log in to the Container registry
+              uses: https://git.quad4.io/actions/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ secrets.REGISTRY_USERNAME }}
+                  password: ${{ secrets.REGISTRY_PASSWORD }}
+
+            - name: Extract DEV metadata (tags, labels) for Docker
+              id: meta-dev
+              uses: https://git.quad4.io/actions/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.10.0
+              with:
+                  images: ${{ env.REGISTRY }}/${{ env.DEV_IMAGE_NAME }}
+                  tags: |
+                      type=raw,value=dev
+                      type=sha,format=short
+
+            - name: Build and push dev Docker image
+              id: build-dev
+              uses: https://git.quad4.io/actions/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
+              with:
+                  context: .
+                  file: ./Dockerfile
+                  platforms: linux/amd64,linux/arm64
+                  push: true
+                  tags: ${{ steps.meta-dev.outputs.tags }}
+                  labels: ${{ steps.meta-dev.outputs.labels }}