avoid panic from environment; ref pterodactyl/panel#2307

environment/docker/container.go

@@ -143,6 +143,15 @@ func (e *Environment) Create() error {
 
 	a := e.Configuration.Allocations()
 
+	evs := e.Configuration.EnvironmentVariables()
+	for i, v := range evs {
+		// Convert 127.0.0.1 to the pterodactyl0 network interface if the environment is Docker
+		// so that the server operates as expected.
+		if v == "SERVER_IP=127.0.0.1" {
+			evs[i] = "SERVER_IP="+config.Get().Docker.Network.Interface
+		}
+	}
+
 	conf := &container.Config{
 		Hostname:     e.Id,
 		Domainname:   config.Get().Docker.Domainname,