Add 3 more examples to REST API docs (#516)

* integrate custom docs with new UI

* more edits

* use website wording for intro

* fix numbering in table

* rename and some edits

* rename manage_repo file, per Bo

* Merge.

* formatting edits

* updates per Keyur's feedback

* Fix typos

* fix nav order

* fix link to API key request form

* update form link

* update key request form and output dir env var

* Revert to gerund

Though the style guide says to just use imperatives, "get started" just sounds weird. Also this is more consistent with "troubleshooting"

* new troubleshooting entry

* fix typo

* new data container procedures

* more work

* more work

* complete data draft

* more changes

* more changes

* more revisions

* update troubleshooting doc etc.

* new version of diagrams

* remove data loading problems troubleshooting entry; can't reproduce

* revert title change

* add example for not mixing entity types

* changes from Keyur

* add screenshots for GCP, and related changes

* fixed one image

* added screenshots for Cloud Run service

* resize images

* more changes from Keyur

* fix a tiny error

* delete unused images

* fix missing dash

* update build file

* adjust build command

* Revert "adjust build command"

This reverts commit 4ce0fb9.

* update docker file

* more fixes

* one last fix

* make links to Cloud Console open in a new page

* fixes to quickstart suggested by Prem

* one more change

* change from Keyur

* revise procedure

* merge

* add brief explanation of data model to quickstart

* slight wording tweak

* incorporate feedback from Keyur

* remove erroneous edit

* correct missing text

* more work on tasks for finding stuff

* merge

* update to use env.sample

* typo

* typo

* get file back in head shape

* fix file name

* add POST requests

* fixes from Jennifer

* more query examples

* fix output of example

* fix formatting

* try again

* fixed one example response