Node week 1&2 updates

[magdazelena]

Part of #268

As we will be moving authentication and security to 3rd week of Node module, weeks 1 and 2 need to be altered.

Proposal for week 1 - scope: Express

• remove authentication bit
• continue on Express explanation and middleware explanation with explaining error handling
  • explain error handling principals (copy from week 2)
  • adding: explain error handling in Express (ending requests or passing errors etc)
  • (to be considered) explain custom error handlers and loggers
  • all created endpoints should be added to Postman (they had it in foundation)

Notes:

• assigments need to be updated accordingly
• the knex methods are introduced in assigment but explained in the next week module. Suggestion: leave them in assigment + prep, skip in week 2

Proposal for week 2 - scope: Designing and documenting REST API

• explaining REST API principles
  • designing the REST structure
• introducing Swagger and OpenAPI
  • how to document API
• starting with adding first endpoint, questions shall arrise around:
  • designing the error handling
  • types for parameters and payloads
• data validation
  • validating for types etc, middleware vs per endpoint etc.
  • knex security and sql injection prevention
• advanced postman
  • collections
  • environments
  • secrets? <-- perhaps could be left for the authentication week 3
  • testing