Add ability to remove an appservice

See merge request famedly/conduit!236

Make traefik+nginx config more self-contained

See merge request famedly/conduit!239

Restore compatibility with Rust 1.53

See merge request famedly/conduit!244

Upgrade Ruma

See merge request famedly/conduit!243

CI: Use sccache for caching

Closes #200

See merge request famedly/conduit!232

Do not store uiaa requests in database

See merge request famedly/conduit!219

refactor:moved key watch wake logic to specific module

See merge request famedly/conduit!238

Upgrade Ruma

See merge request famedly/conduit!237

The nginx instance which is serving the .well-known endpoints can serve
the simple JSON replies directly from memory, instead of having them
as external files on disk.

Userid and DeviceID are of unknown size, use Box to be able to store
them into the userdevicesessionid_uiaarequest BTreeMap

Fixes compilation error after ruma upgrade

There is no need to encode or decode anything as we are not
saving to disk

uiaarequests can contain plaintext passwords, which were stored on disk

some uiaa requests contain plaintext passwords which should never be
persisted to disk.

Currently there is no cleanup implemented (you have to restart conduit)