How do I send requests to a private network?

I'm trying to connect to a NodeJS server I wrote in my school network from home so I can work on it. However it's behind a router firewall I have no access to. Is there any way I can make my server accessible from the outside so I can make requests from it?

I was considering some kind of socketed connection where my server tries to "reach out" to my home network every second to establish a link which we can use, but I'm not sure that's feasible or even the best way to go about it.