ci: don't login to the Docker hub for PRs

Author: dunglas

.github/workflows/docker.yaml

@@ -134,6 +134,7 @@ jobs:
           platforms: ${{ matrix.platform }}
       - name: Login to DockerHub
         uses: docker/login-action@v3
+        if: github.event.pull_request.head.repo.full_name == github.repository
         with:
           username: ${{ secrets.REGISTRY_USERNAME }}
           password: ${{ secrets.REGISTRY_PASSWORD }}
@@ -222,6 +223,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
       - name: Login to DockerHub
         uses: docker/login-action@v3
+        if: github.event.pull_request.head.repo.full_name == github.repository
         with:
           username: ${{ secrets.REGISTRY_USERNAME }}
           password: ${{ secrets.REGISTRY_PASSWORD }}

.github/workflows/static.yaml

@@ -101,6 +101,7 @@ jobs:
           platforms: ${{ matrix.platform }}
       - name: Login to DockerHub
         uses: docker/login-action@v3
+        if: github.event.pull_request.head.repo.full_name == github.repository
         with:
           username: ${{ secrets.REGISTRY_USERNAME }}
           password: ${{ secrets.REGISTRY_PASSWORD }}
@@ -204,6 +205,7 @@ jobs:
           platforms: ${{ matrix.platform }}
       - name: Login to DockerHub
         uses: docker/login-action@v3
+        if: github.event.pull_request.head.repo.full_name == github.repository
         with:
           username: ${{ secrets.REGISTRY_USERNAME }}
           password: ${{ secrets.REGISTRY_PASSWORD }}
@@ -313,6 +315,7 @@ jobs:
         uses: docker/setup-buildx-action@v3
       - name: Login to DockerHub
         uses: docker/login-action@v3
+        if: github.event.pull_request.head.repo.full_name == github.repository
         with:
           username: ${{ secrets.REGISTRY_USERNAME }}
           password: ${{ secrets.REGISTRY_PASSWORD }}