[Bug] self-host firecrawl does not use `PROXY_SERVER` at all

[binary-husky]

Describe the Bug

self-host firecrawl does not use PROXY_SERVER at all.

Reproduce:

• use .env

PORT=43002
PROXY_SERVER=http://x.x.x.x:42313

• monitor network traffic using sudo iftop
• send request to firecrawl
• iftop shows no one connect to proxy server !!!!

Other evidence:

• change PROXY_SERVER to random ip
  • firecrawl does not report any error !!!!
• change PORT
  • PORT is changed as expected, meaning that docker compose config is effective

To Reproduce