add the function to be able to set up a server with one goalie, and if a player selects the goalie position, they will be goaltending both goals until a 2nd goalie fills the other goalie slot

function will work as,

when puck on blue side - it puts the goalie on the blue side to defend
when puck on red side - it puts the goalie on the blue side to defend

the puck has to cross the center line for the goalie to be switched to the other side

you can add this as an on/off feature when setting up your server