wait for service to start before running script

docker/chain/Dockerfile

@@ -67,8 +67,8 @@ RUN apk add npm
 # RUN echo "/usr/local/bin/dockerd & " >> run
 RUN echo "dockerd-entrypoint.sh & " >> run
 RUN echo "until docker info >/dev/null 2>&1; do " >> run
-    #echo "Waiting for Docker to start..."
-RUN echo " sleep 1" >> run
+RUN echo "   echo 'Waiting for Docker to start...'" >> run
+RUN echo "   sleep 1" >> run
 RUN echo "done" >> run
 
 # RUN echo "sleep 5 " >> run
@@ -96,8 +96,11 @@ RUN echo "docker run -d --name devnet -p 0.0.0.0:8547:8547 -p 0.0.0.0:8548:8548
 # RUN dpkg -i cloudflared-linux-${arch}.deb
 
 
-RUN echo "sleep 5 " >> run
-
+# RUN echo "sleep 5 " >> run
+RUN echo "until wget -qO- http://0.0.0.0:8547 >/dev/null 2>&1; do " >> run
+RUN echo "   echo 'Waiting for Nitro to start...'" >> run
+RUN echo "   sleep 1" >> run
+RUN echo "done" >> run
 
 RUN echo "cd hardhat" >> run
 RUN echo "npm install" >> run