Ok thank you! Just to be sure to understand, as I put rpcbind=0.0.0.0:8332 127.0.0.1:8332 address will not be accessible anymore right? Or yes it's still working as usually because 0.0.0.0 maps 127.0.0.1.
Sorry it's more a general network question than bitcoin focused...
When you run a reverse proxy, you can still access the original address. (You must be able to, otherwise the reverse proxy would not function properly.)
0.0.0.0 is not an address you can query by CURL or browser, it just means "listen to each address of all of my network interfaces" so that means your Ethernet port (if you use that), your wifi interface, the loopback "localhost" interface and so forth. Also if you have software like Docker that creates new virtual interfaces then it binds to that address on the 8332 port too and so on.