Battleships

Steps

1. User creates a game through link
2. Another player is invited to the game
3. Players place their ships on the board
4. Players press 'Ready' when all their ships are placed correctly
5. Player one fires a rocket at a square
   1. If miss, player 2 gets the turn.
   2. If hit, the square is marked red and the player goes again
6. Player is notified when it sinks a ship of the other player
7. When all ships are sunken of a player, the other player wins.