Few fixes/tweaks for the Cache app, but still a bit to go

Hey man,

Here are a few things I did to tweak the application. There's actually a few more things to do to make it more secure, but I figured I had already changed a lot of things already :)
If you have ENV variables, its perfect that you use ```.gitignore```. But you should provide a .env.example file so that way someone can easily setup their .env file.