[chore] Trigger workflow on PR close.

.github/workflows/docker.yml

@@ -2,8 +2,9 @@ name: Docker
 
 on:
     push:
-        branches:
-            - "handmade"
+        # TODO: Bring back branch push once gitea is updated past 1.21
+        # branches:
+        #     - "handmade"
         tags:
             - "*"
         # TODO: Bring back once gitea is updated past 1.21
@@ -18,6 +19,7 @@ on:
     pull_request:
         branches:
             - "handmade"
+        types: [opened, synchronize, reopened, closed]
         # TODO: Bring back once gitea is updated past 1.21
         # paths-ignore:
         #     - ".github/**"
@@ -33,8 +35,6 @@ on:
 jobs:
     publish:
         runs-on: ubuntu-latest
-        # NOTE: Running on pull requests for now, but without pushing.
-        # if: github.event_name != 'pull_request'
         steps:
             - name: Checkout
               uses: actions/checkout@v4
@@ -53,7 +53,7 @@ jobs:
                   DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index
             - name: Login to DockerHub
               uses: docker/login-action@v1
-              if: github.event_name != 'pull_request'
+              if: github.event_name != 'pull_request' || github.event.pull_request.merged == true
               with:
                   username: ${{ secrets.DOCKERHUB_USERNAME }}
                   password: ${{ secrets.DOCKERHUB_TOKEN }}
@@ -61,7 +61,7 @@ jobs:
               uses: docker/build-push-action@v6
               with:
                   context: .
-                  push: ${{ github.event_name != 'pull_request' }}
+                  push: ${{ github.event_name != 'pull_request' || github.event.pull_request.merged == true }}
                   platforms: linux/amd64,linux/arm64
                   tags: ${{ steps.meta.outputs.tags }}
                   annotations: ${{ steps.meta.outputs.annotations }}