Make appName and key always lowercase to match how subdomains are always lowercase

[nsmith7989]

I ran into this issue when I was trying to dockerize this. Here's what happened:

Our branch names generally contain a jira issue id which contains capital letters. Something like: NHCRES-123.

If I use the subdomain package resolver this would result in a url like http://NHCRES-123.myapp.backstage-server.com, which most browsers change to http://nhcres-123.myapp.backstage-server.com. If this server is running on a case sensitive file system then package is not found.

IMO it is a nicer default to always convert package name (key) and app name to lowercase to solve this issue.

[jessepinho]

Thanks for the PR, @nsmith7989 ! Just saw it, so sorry for the delay. Will take a look in the next few days :)

[jessepinho]

@nsmith7989 Well, clearly I never got back to this 😆 Have you tested your branch and it works? If so, could you please just push up a commit that reverts the tsconfig.json changes in this PR, since it looks like they're just formatting changes? Then I'll merge. Thanks!