TLDR:
Click this link
How to make a desktop shortcut to a source engine based game server?
Start by right clicking on your desktop.
Create a new shortcut.
When it asks for the target URL put “steam://connect/ip:port”
In our case: “steam://connect/play.deeteenetwork.com:7000”
Then set the name to whatever you want that for you is simple and memorable.
And then simply double click it if you want to join the server. You don’t even need to launch the game it will do that for you if it is not already launched.