Trouble with configuring slack in dev env

[czarmax]

Hello,

I try to test Slack app in dev env. I run Saleor inside Docker with Saleor platform and slack app locally. The Slack app is tunneled, so while installing I insert https://<url_tunnel>/api/manifest. I checked Upstash and the key is well saved while installation.

I see 400 error when the api tries accessing the https://<url_tunnel>/api/configuration.

My env file presented as such:

SECRET_KEY=12345

APP_LOG_LEVEL=debug

APL=upstash
UPSTASH_URL=<url>
UPSTASH_TOKEN=<token>

Any ideas on the route cause ? I tag @lkostrowski as you seems to be the biggest contributor.