please how to make my domain that-cruise.net.ng work like forum.wapka.io

[Thatcruise]

my site load 502 error since xx when wapka is down but forum.wapka.io is working perfectly how can i also make my site works

[spwk]

forum.wapka.org operates smoothly because it has a robust configuration, the server is separate from wapka.org, and the source code has been optimized for many years