Is it possible to access the local site from another network? Like run a local server, that I can access from my phone outside of the house? I looked into this before, but I could never find a simple solution.

With IPv4 you can do it with a port forward, but the IP listed isn't the same as the IP you'll actually receive the connection on. You can get your external IP relatively easily with `curl ifconfig.co`.

If firewalls or port forwards aren't available to you, pick any of the popular port forwarding methods (here's a list: https://github.com/anderspitman/awesome-tunneling). I'm a big fan of just SSH-ing into an internet connected machine myself (`ssh -R 0.0.0.0:3000:127.0.0.1:3000 server.on.the.inter.net` will expose localhost:3000 on server.on.the.inter.net:3000 and encrypt the traffic between you and the server as an added bonus!) but there are plenty of paid and sketchy alternatives if you don't have a server to SSH into.