Hi ckessel,
Welcome to the forum.
To automate that process, select your space dock, press tab to switch to galaxy view, and then right click the planet you'd like the produced ships to head to.
Hope this helps.
Have fun playing AI War.
EDIT: I apologize for not reading your post carefully enough, you can't order ships to head to a specific point on another planet. When you set a waypoint to another planet, the ships will stop at the wormhole they arrive through.