Fix github actions

Author: ban-mi

.github/workflows/github-actions-micronaut-webserver.yml

@@ -35,6 +35,15 @@ jobs:
         container_id=$(docker run --rm -d -p8080:8080 webserver:distroless-java-base.jar)
         sleep 10
         docker ps
+        sleep 2
+        for i in {1..10}; do
+          if curl -s "http://localhost:8080/" > /dev/null; then
+            echo "Server is up!"
+            break
+          fi
+          echo "Waiting for server..."
+          sleep 2
+        done
         curl "http://localhost:8080/"
         docker kill $container_id
         docker ps