fix: only try to push Docker images when not coming from a fork (#51)

Author: pfeerick

.github/workflows/docker-image.yml

@@ -39,6 +39,7 @@ jobs:
 
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v3
+        if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
@@ -49,7 +50,7 @@ jobs:
         with:
           context: dev/
           file: dev/Dockerfile
-          push: true
+          push: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
 
@@ -80,6 +81,7 @@ jobs:
 
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v3
+        if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
@@ -91,7 +93,7 @@ jobs:
           context: builder/
           file: builder/Dockerfile
           platforms: linux/amd64,linux/arm64
-          push: true
+          push: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
 
@@ -119,6 +121,7 @@ jobs:
 
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v3
+        if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
@@ -129,6 +132,6 @@ jobs:
         with:
           context: wasi/
           file: wasi/Dockerfile
-          push: true
+          push: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}