fix: cookie error (#127) (#210)

* Add support for custom PulseAudio cookie configuration

.env.example

@@ -21,6 +21,7 @@ LVA_USER_GROUP="1000"
 # Pipewire Server:      /run/user/1000/pulse/native
 LVA_PULSE_SERVER="unix:/run/user/${LVA_USER_ID}/pulse/native"
 LVA_XDG_RUNTIME_DIR="/run/user/${LVA_USER_ID}"
+LVA_PULSE_COOKIE="/app/configuration/tmp_pulse_cookie"
 
 ### Path to the preferences file (optional):
 # PREFERENCES_FILE="/app/configuration/preferences.json"