ci: disable push if not upstream repo

Signed-off-by: CrazyMax <[email protected]>
(cherry picked from commit 0e70765)

Author: crazy-max

.github/workflows/buildkit.yml

@@ -81,6 +81,9 @@ jobs:
               PUSH=push
             fi
           fi
+          if [ "$GITHUB_REPOSITORY" != "moby/buildkit" ]; then
+            PUSH=false
+          fi
           echo "tag=${TAG}" >>${GITHUB_OUTPUT}
           echo "push=${PUSH}" >>${GITHUB_OUTPUT}
           platforms=$(docker buildx bake release --print | jq -cr '.target."release".platforms')

.github/workflows/frontend.yml

@@ -61,6 +61,9 @@ jobs:
               PUSH=push
             fi
           fi
+          if [ "$GITHUB_REPOSITORY" != "moby/buildkit" ]; then
+            PUSH=false
+          fi
           echo "typ=${TYP}" >>${GITHUB_OUTPUT}
           echo "push=${PUSH}" >>${GITHUB_OUTPUT}
           echo "tag=${TAG}" >>${GITHUB_OUTPUT}