Instruction fix

Fixed error in that tutorial called for changing the SITEURL manually, adding port 4567, then proceeding to have you run geonodeupdate-ip with only localhost, effectively overwriting/resetting your SITEURL to just localhost (port 80).  Simplified to just running the command with the port added
Added port to instruction

Forgot!
Merge pull request #1500 from twelch/patch-1

Instruction fix