Expose Sentry through Traefik

[valentinyanakiev]

Description

As a CT Product Manager I want to understand the client-side issues so I can find root causes of issues quickly and prioritise the backlog accordingly.

Acceptance criteria

• [ ] Sentry is accessible outside of our k8s dev cluster at https://dev.cherrytwist.org/sentry
• [ ] Clients' errors are reported to Sentry - DSN endpoint is reachable outside of our k8s cluster

Additional Context