Of course, after than, whatever you've just plugged into it, will most likely not work
502 Bad Gateway
504 Gateway Timeout
X-Forwarded-For
The solution is probably somewhere deep in the bowels of whatever you're trying to make work
It will look obvious once you've figured out, that's why it wasn't mentioned next to the bunch of instruction you pasted into your console to install the thing
Just another day walking in the forest of papercuts
I'm coming from the perspective of administrative interfaces, not generic forms. See my other reply for the examples that I use daily that made me have a different "intuition" here. Edit: But the fact that I got three replies in like a few minutes also shows that my perspective might not be the universal one. Still, I think it does hold up in the context of administrative interfaces (which is what NPM is).