environment var BASE_URL isn't working

[Tone866]

Describe the bug
The env-var "BASE_URL" isn't working in the docker image. So the website doesn't works behind a reverse proxy in a subdir.

Version
Exact version in the top right area: 0.42

To Reproduce

Steps to reproduce the behavior:
I start the container with

docker run -d 
--name changedetectionio \
--restart unless-stopped \
--link selenium \
--link browserless \
-p 5000:5000 \
-e WEBDRIVER_URL="http://selenium:4444/wd/hub" \
-e PLAYWRIGHT_DRIVER_URL="ws://browserless:3000/?stealth=1&--disable-web-security=true" \
-e USE_X_SETTINGS=1 \
-e BASE_URL="https://domain/changeio/" \
-v datastore-volume:/datastore \
dgtlmoon/changedetection.io

All vars are working, but BASE_URL.
If I check on settings -> Base URL
I get an empty var Default value is the ENV var 'BASE_URL' (Currently "")

Expected behavior
The var should be set.

[dgtlmoon]

this one is only for the notifications..

[dgtlmoon]

there is some other threads here about this if it helps

[dgtlmoon]

https://github.com/dgtlmoon/changedetection.io/wiki/Running-changedetection.io-behind-a-reverse-proxy

[dgtlmoon]

aaah my apologies, yeah this needs a pytest added to be sure I think