Fix internal restream error and add docs for reducing camera connections (#4431)

* Start restream before detection

* Add docs explaining how to reduce connections to the camera

* Fix typos for consistency

* Add link to other part of doc for readability

frigate/app.py

@@ -355,6 +355,7 @@ class FrigateApp:
             print(e)
             self.log_process.terminate()
             sys.exit(1)
+        self.init_restream()
         self.start_detectors()
         self.start_video_output_processor()
         self.start_detected_frames_processor()
@@ -362,7 +363,6 @@ class FrigateApp:
         self.start_camera_capture_processes()
         self.init_stats()
         self.init_web_server()
-        self.init_restream()
         self.start_mqtt_relay()
         self.start_event_processor()
         self.start_event_cleanup()