Add wait-for-it script to halt webserver untill database ready

src/Dockerfile

@@ -18,6 +18,6 @@ RUN chmod +x /entrypoint.sh
 
 ENTRYPOINT ["/entrypoint.sh"]
 
-RUN chmod +x ./wait
+RUN chmod +x ./wait-for-it.sh
 
 CMD ["./wait-for-it.sh", "-h", "10.5.0.5", "db:3306", "--", "/start.sh"]