Remove trailing slashes from front end requests

[Fattigman]

When doing calls to the backend, refrain from ending your call with trailing slashes.

FastAPI has a weird behaviour that it tries to redirect when it find trailing slashes. I tried to fix it with #101 but it just introduced new bugs #110 and #109.

So I will do rollback and in the end you shouldnt end your calls with trailing slashes.

[Fattigman]

I was wrong, it should end with trailing slashes

[moedarrah]

Done!