Metabase + PostgresSQL on Docker - "Unauthenticated" error - postgresql

Question

Used docker compose for metabase and postgres images.
Managed to build successfully. Went through the Metabase setup, no hitches.
However, I can't seem to get past the sign in page. Each time I enter the correct username and password I used at the setup stage, it still returns me to the sign in page.
Checking the docker logs, I keep seeing this error on sign in attempts:
2022-09-24 23:24:31,502 DEBUG middleware.log :: GET /api/user/current 401 320.3 µs (0 DB calls)
"Unauthenticated"
Not sure what could be wrong?

Answer 1

Turns out the answer had nothing at all to do with Metabase or Docker, but with my Nginx configuration
Problem was in my location block. Initial settings were:
location / {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Proto https;
proxy_pass http://localhost:<some_port>; # <- put correct port
}
Changed them to
location / {
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Proto $scheme; # <- *changed to this*
proxy_pass http://localhost:<some_port>; # <- put correct port
proxy_http_version 1.1; # <- *add this*
}
...and the error was gone: can log in now.