feat(web): Support redirecting to custom url for index page

config.example.toml

@@ -1,13 +1,19 @@
 username = ""
 password = "asd123"
 #proxyaddr = "socks5://localhost:5555"
-hostURL = "https://my.domain.tld"
+
+#usewebserver = false
+indextarget = "https://discord.gg/Kw4MFGxYEj" # Optional
+hostURL = "https://my.domain.tld" # Can be omitted if not using webserver
+
 webhook = "https://domain.tld/api/webhooks/"
+
 channels = [
   "NinEverything",
   "NintendoEurope",
   "NintendoAmerica",
 ]
+
 # Binary representation for efficient filtering
 # Bit from left to right (most to least significant bit): IsSelfThread, IsRetweet, IsReply, IsPin, IsQuoted
 filter = [