feat(api): replace uwsgi with gunicorn (#1785)

Related to #1719

BREAKING: The uwsgi packages and configuration files (`/etc/airtime/libretime-api.ini`) should be removed from the system.

api/install/systemd/libretime-api.service

@@ -3,13 +3,18 @@ Description=LibreTime API Service
 
 [Service]
 Type=notify
-NotifyAccess=all
-KillSignal=SIGQUIT
+KillMode=mixed
+PrivateTmp=true
 
 Environment=LIBRETIME_LOG_FILEPATH=/var/log/libretime/api.log
 Environment=LIBRETIME_CONFIG_FILEPATH=/etc/airtime/airtime.conf
 
-ExecStart=/usr/bin/uwsgi /etc/airtime/libretime-api.ini
+ExecStart=/usr/bin/gunicorn \
+        --workers 4 \
+        --log-file - \
+        --bind 127.0.0.1:8081 \
+        libretime_api.wsgi
+ExecReload=/bin/kill -s HUP $MAINPID
 User=libretime-api
 Group=libretime-api
 Restart=always

api/install/uwsgi/libretime-api.ini

@@ -1,10 +0,0 @@
-[uwsgi]
-module = libretime_api.wsgi
-
-master = true
-plugin = python3
-processes = 10
-vacuum = true
-http-socket = :8081
-uid = WEB_USER
-gid = WEB_USER

api/packages.ini

@@ -2,10 +2,8 @@
 [python]
 python3 = buster, bullseye, bionic, focal
 python3-pip = buster, bullseye, bionic, focal
-
-[django]
-uwsgi = buster, bullseye, bionic, focal
-uwsgi-plugin-python3 = buster, bullseye, bionic, focal
+gunicorn = buster, bullseye, bionic, focal
+python3-gunicorn = buster, bullseye, bionic, focal
 
 [psycopg2]
 # See https://www.psycopg.org/docs/install.html#install-from-source