Updated SERVER_IP description

Author: Micke90s

README.md

@@ -98,7 +98,7 @@ These are the arguments you can use to customize server behavior with default va
 | SEASON | No Default | Overrides current season by setting to any of None (0), Easter (1), Halloween (2), Christmas (3), Valentine (4), Anniversary (5), CherryBlossom (6), LunarNewYear(7).<br/>**Do not set this env var if you want real date season.** |
 | GAME_ID | "" |  Game ID to use for the server. Need to be at least 15 characters, no longer than 28 characters and alphanumeric. Empty or not valid means a new ID will be generated at start. |
 | MAX_PLAYERS | 10 | Maximum number of players that will be allowed to connect to server. |
-| SERVER_IP | No Default | Only used if port is set. Sets the address that the server will bind to. |
+| SERVER_IP | No Default | Only used if port is set. Sets the address that the server will bind to. Supports ipv4 and ipv6 addresses. If not set, default value 0.0.0.0 is used, which will accept connections from any internal ip. |
 | SERVER_PORT | No Default | Port used for direct connection mode. **Setting an value to this will cause the server behaviour to change!** [See Network Mode](#network-mode) |
 | PASSWORD | No Default | Password players should use when trying to join using direct connections. Maximum length password can be 28 characters. If omitted or invalid, a random password will be generated.|
 | ALLOW_ONLY_PLATFORM | No Default | Allow only players from given platform. If not set all platforms are allowed. Has no effect unless -port is also set enabling Direct Connections. Can be Steam (1), Epic (2), Microsoft (3), GOG (4). |