Once I succeed to install discourse on EC2 manually , I shutted down EC2 and reboot them.
But I couldn’t access previous site. and I searched and tried
/var/discourse # ./launcher start app
I encountered some error message like below.
starting up existing container
+ /usr/bin/docker start app
Error response from daemon: driver failed programming external connectivity on endpoint app (): Error starting userland proxy: listen tcp 0.0.0.0:80: bind: address already in use
Error: failed to start containers: app
As I am beginer,I would like to know reference page.If you have any information, please let me know.