Merge github.com:tmolitor-stud-tu/cheogram-sip

* github.com:tmolitor-stud-tu/cheogram-sip:
  Activate ICE and add google STUN to detect server's external IP
  Fix docker build

Activate ICE and add google STUN to detect server's external IP

Fix docker build

Activate ICE and add google STUN to detect server's external IP

Fix docker build

Dockerize

Allow functioning also as PSTN gateway a bit

Comment marker for outbound calls

Allow different asterisk component domain

Make redis optional

Allow newer network-protocol-xmpp

Allow newer attoparsec

Allow newer bytestring

Allow newer cryptonite

Allow newer text

Allow newer base

Need git deborig first time

features need to be sorted for caps

Request non-trickle ICE

Asterisk doesn't really handle tricked candidates very well, it can
work, but better to not when the client can avoid it.

Fix guix build