More complete examples, better READMEs

[swi-jared]

• Added a database example in the HTTP example
• Created a gRPC client/server example
• Updated and created READMEs
• Updated a bunch of dependencies

Here's a link to the branch in github so you can click around the READMEs.

[tammy-baylis-swi]

TODO for the user playing with this example right? Then this is ok here

[swi-jared]

Yes and no. It's super not important given that these are examples, but yes it's also a hint to the user "don't do this".

[tammy-baylis-swi]

Since this nice example now has the added responsibility of showing a bit of context in db queries, could we also have some of that info added to this readme? Some of that is already commented in main.go, e.g. The SQL commenter helps associate queries with traces. and It's important to inject the request context into the query call because it carries the current trace information

[swi-jared]

I've updated the intro paragraph. Care to take another look?

[tammy-baylis-swi]

Thanks @swi-jared ! Just a few suggestions/questions I had.

[tammy-baylis-swi]

Thank you @swi-jared !!