make go2rtc always rebuild config at startup (blakeblackshear#8664)

* make go2rtc always rebuild config at startup

/dev/shm can be left mounted (in fact im pretty sure it's always left mounted) on the docker host after shutting down the frigate container.
If we only check that the file doesn't exist, stale data gets re-read every startup 
This will make troubleshooting a nightmare for the average user.

I had given up troubleshooting go2rtc several times because of this.

* generate config after supervisor data is loaded

* Fix fi

* fix fi

---------

Co-authored-by: Nicolas Mowen <[email protected]>

docker/main/rootfs/etc/s6-overlay/s6-rc.d/go2rtc/run

@@ -45,15 +45,21 @@ function get_ip_and_port_from_supervisor() {
 
 export LIBAVFORMAT_VERSION_MAJOR=$(ffmpeg -version | grep -Po 'libavformat\W+\K\d+')
 
+if [[ -f "/dev/shm/go2rtc.yaml" ]]; then
+ echo "[INFO] Removing stale config from last run..."
+ rm /dev/shm/go2rtc.yaml
+
 if [[ ! -f "/dev/shm/go2rtc.yaml" ]]; then
- echo "[INFO] Preparing go2rtc config..."
+ echo "[INFO] Preparing new go2rtc config..."
 
  if [[ -n "${SUPERVISOR_TOKEN:-}" ]]; then
  # Running as a Home Assistant add-on, infer the IP address and port
  get_ip_and_port_from_supervisor
  fi
 
  python3 /usr/local/go2rtc/create_config.py
+else
+ echo "[WARNING] Unable to remove existing go2rtc config. Changes made to your frigate config file may not be recognized. Please remove the /dev/shm/go2rtc.yaml from your docker host manually."
 fi
 
 readonly config_path="/config"