Browser Router

Finally! We have programmatic pages for these posts! I spent a lot of time banging my head against the wall trying to figure out the best way to use React Router to do this, but I think I'm finally starting to chip away at the mountain of understanding. This task was in that problematic spot of being too difficulty where the simple documentation is too simple and people assume that if you're doing this you kind of know what you're doing so I was definitely riding that gap a lot today, but I think I have a good outline / backbone for further improvements to the site. I feel like there's more that I want to say, but that will probably come in a later post after I've done some more stuff on stuff stuff. My poor brain must still think it doesn't have enough blood. Whelp, on to the inevitable troubleshooting that will come when I try to push these changes to production!