Troubleshooting content repository sections

[smashwilson]

Include a section on troubleshooting common content repository configuration and build problems (like mismatched content IDs).

/cc @catlook, @meker12

[catlook]

@meker12 Thanks for keeping an eye on us!! We've migrated the blog and How-To off of deconst!

[meker12]

I had heard that 😊. Just cleaning up my Github issues.