API: create a basic api that fits out project requirements

[jeff-knurek]

Problem

At the moment, the code in /API is all from version 1.0 and is obsolete. We need a new api code base, and we need to start it off with a simple structure that can grow to meet our needs.

Proposed solution

Technology

• Nest.js: https://nestjs.com/ (api framework)
• Mongoose: https://mongoosejs.com/ (db framework)
• Typescript: https://www.typescriptlang.org/ (language)
• Jest: https://jestjs.io/ (test framework)

Using the technology requirements above, the scope of this ticket is to:

1. create a new code base for a rest api using the technologies above
2. provide an endpoint to query all the Datasetentries for a given time range, and return the array of objects un-modified
   a. this endpoint does not need to meet documentation requirements yet
3. add a basic caching layer, so that a subsequent request does NOT get processed
4. add unit tests for the new code

Resources

• Endpoint documentation https://theiofoundation.stoplight.io/docs/projectlockdown/docs/index.md
• Figma sketches https://www.figma.com/file/8hZMv4ks9lrrl1K0uGfEKx/%5BPROD%5D-DataSet-Layers-(DSL)
• Data Lifecycle https://www.figma.com/file/8hZMv4ks9lrrl1K0uGfEKx/PROD-DataSet-Layers-DSL?node-id=262%3A4