Fix character movement speed, fix for diagonal movement and disabled it by default

.env.example

@@ -4,6 +4,9 @@ PORT=4000
 DATABASE_URL="mysql://root@localhost:3306/nq"
 JWT_SECRET="secret"
 
+# Game configuration
+ALLOW_DIAGONAL_MOVEMENT=false
+
 # Default character create values
 DEFAULT_CHARACTER_ZONE="0"
 DEFAULT_CHARACTER_POS_X="0"