envs.net matrix instance config's & tools

HS instance: envs.net

more informations on https://envs.net/chat/matrix/

useful documentations

- matrix-spec
- synapse INSTALL.md
- synapse default homeserver.yaml

- synapse-delagate
- synapse-workers
- synapse-metrics

- synapse admin API

- matrix-synchrotron-balancer
- matrix-media-repo