sleep until docker ready

.harness/firebase-deploy.yaml

@@ -44,7 +44,9 @@ spec:
             apk add --no-cache git
             t=registry-app.inhome.blapointe.com:5001/portfolio/resume/builder:latest
             if true || git diff --name-only ${{ build.before }} ${{ build.after }} | grep Dockerfile.cicd; then
-              sleep 10
+              until docker ps; do
+                sleep 5
+              done
               docker build -t "$t" -f ./Dockerfile.cicd .
               docker push "$t"
             fi