web: add more config options

env.example

@@ -58,6 +58,18 @@ TZ=UTC
 # Show a prejoin page before entering a conference
 #ENABLE_PREJOIN_PAGE=0
 
+# Enable the welcome page
+#ENABLE_WELCOME_PAGE=1
+
+# Enable the close page
+#ENABLE_CLOSE_PAGE=0
+
+# Disable measuring of audio levels
+#DISABLE_AUDIO_LEVELS=0
+
+# Enable noisy mic detection
+#ENABLE_NOISY_MIC_DETECTION=1
+
 #
 # Let's Encrypt configuration
 #