Update db.yml so postgresql_db uses template0

Closes #5

See merge request !4

Closes #5

Update nginx.conf.j2 based on https://governance.funkwhale.audio/d/0P4YcUp6/comment/1008

See merge request !3

services failed after first configuration till reboot. this fix restarting systemd and preventing on-file event

Add option to disable access to api dashboard

See merge request !2

Single command install

See merge request !1