I managed to get my Angular 5 app running on AWS EC2 Ubuntu...
Started standard Ubuntu instance, used PuTTy to shell in, installed node, entered the next 4 \"magic l
First of all, please note that the built-in webserver in ng-cli is not intended to be used in production. I strongly advise you to find a better solution if this is for production.
In order to access the site from other devices/ over the internet, you have to instruct ng-cli to serve it at the correct IP-adress. You can do that by running ng serve --host x.x.x.x.
It will probably work if you enter your servers LAN-IP (depending on your setup). You can find it by running ifconfig.
However, since you are hosting a static website, an alternative solution is to simply host the app on S3. To do that, run ng build --prod and upload the dist-folder to AWS S3. They have a tutorial for that here.
Alternatively, you can use something like Apache or nginx to serve your compiled app from your EC2-instance.