* new todo frontend
* yarn --> npm
* basic Dockerfile
* add Helm chart for todo list
* backend working
* connect new-app'd frontend to backend via proxy_pass
* move nginx conf
* move nginx conf back
* move helm chart to course repo
* add simple SSR node.js service
* log error message
* fix host typo
* fix dockerfiles
* add link to items page
* improve probe route for todo-backend
* canary probe route for todo-backend
* Dockerfile -> Containerfile todo-backend
* Dockerfile -> Containerfile todo-frontend
* remove commands for containerfile as part of comp review
The "todo-backend" application fails to start in the current
version of the do288 OCP 4.2 course, which prevents completion
of the lab "Containerizing and Deploying a Service" in chapter
10, section 3.
This "todo-backend" application's "package.json" file appears to
have been copied from a previous lab ("todo-single"), but the
version number of the "restify" depdency has been transposed from
"4.3.0" (working) to "4.0.3" (broken).
This commit enables this lab to be completed successfully.
