You won't do a front-end alignment - not adjustable and would only be out of line if you hit something. The rear needs to be checked for alignment every time you change a tire or adjust the chain tension. Here's what you do:
Get a couple of straight pieces of pipe or wood about 8' long (anything straight will do). Have a friend hold your bike straight up. Put the straightedges on the ground on either side of the bike, just touching the rear tire and parallel with the tire. Make sure front tire is straight. Now check to see if there is even space on either side of the front tire between the straightedge and tire. Basically, you are extending the plane of the rear tire and making sure it's centered with the front. Adjust rear tire 'angle' by using axle adjusting nuts at the rear of the swingarm. You can get pretty close 'by eye', but the straightedges are a good reference to use.
Get a couple of straight pieces of pipe or wood about 8' long (anything straight will do). Have a friend hold your bike straight up. Put the straightedges on the ground on either side of the bike, just touching the rear tire and parallel with the tire. Make sure front tire is straight. Now check to see if there is even space on either side of the front tire between the straightedge and tire. Basically, you are extending the plane of the rear tire and making sure it's centered with the front. Adjust rear tire 'angle' by using axle adjusting nuts at the rear of the swingarm. You can get pretty close 'by eye', but the straightedges are a good reference to use.