Enhance how meeting backends are defined.

[Jarzamendia]

Enhance how meeting backends are defined, making possible to alternate the embed meeting solution.

With this, in scenarios where we have our solutions hosted locally or we use services in the cloud, we can use Matrix as a friendly frontend.

Description

• Make the Default Meeting Backend by a ENV Variable or config file.
• Create a way to change the dependencies of the meeting backend (to alternate between solutions).
• Create a option to togle between "Open in a new tab" and "embed".

[juliemar]

Possible solution

We have to change these files to use ENVIRONMENT variable that define jitsi URI:

https://github.com/ResultadosDigitais/matrix/blob/master/frontend/src/morpheus/containers/RoomPage.js#L64

https://github.com/ResultadosDigitais/matrix/blob/master/backend/app/views/morpheus.ejs#L24

how to test

We can run jitsi locally with Docker. https://github.com/jitsi/docker-jitsi-meet