nginx
HTTP server and reverse proxy.
Official documentation- nginx: [emerg] host not found in upstream "backend"nginx fails with host not found in upstream when a proxy_pass or upstream hostname does not resolve at startup, common with Docker service names. Fixes.
- nginx: "proxy_pass" cannot have URI part in location given by regular expressionnginx rejects proxy_pass http://host/path/ inside a regex location, named location, if or limit_except. Remove the URI part and change the path with rewrite.