fix(docker): inject real commit id into build via NEXT_DEPLOYMENT_ID

next.config.ts falls back to `git rev-parse HEAD`, but the build context has
no .git (excluded by .dockerignore), so every CI build printed fatal git
errors and stamped the release as "unknown". Pass the deploy commit sha as a
NEXT_DEPLOYMENT_ID build-arg so git is never invoked and the actual commit
reaches NEXT_PUBLIC_CMS_RELEASE and deploymentId.

scripts/ci-deploy.sh

@@ -74,7 +74,8 @@ pnpm install --frozen-lockfile
 pnpm exec playwright install chromium
 
 echo "Building $image"
-DOCKER_BUILDKIT=1 docker build --network=host --progress=plain --cache-from epicnext-cms:latest -t "$image" .
+DOCKER_BUILDKIT=1 docker build --network=host --progress=plain --cache-from epicnext-cms:latest \
+  --build-arg NEXT_DEPLOYMENT_ID="$sha" -t "$image" .
 check_current
 pnpm db:migrate
 check_current