[DO NOT MERGE] Proposed spikes for JSLB4

jslb4-spikes.md

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+Here is the proposal for the followup tasks for
+https://github.com/strongloop/loopback-next/issues/1978. Anything needs to be
+clarified or you'd like to be added, do let me know.
+
+**1. Spike: Dependency injection or its alternative in JSLB4**
+
+_Acceptance criteria:_
+
+a. Should be demonstrated in a class b. Should be used with
+[JSLB4 Application class](https://github.com/strongloop/loopback4-example-javascript/blob/class-factory/server/application.js)
+c. Should be able to read properties from the LB4 `context` d. Should be able to
+bind new properties the LB4 `context` e. Should be able to unbind properties
+from the LB4 `context`
+
+**2. Spike: Create Route in JSLB4**
+
+_Acceptance criteria:_
+
+a. Should be created as a class b. Should be useable with
+[JSLB4 Application class](https://github.com/strongloop/loopback4-example-javascript/blob/class-factory/server/application.js)
+c. Should have access to: i. The LB4 request object and metadata contributed by
+LB4 components eg: `@loopback/authentication` ii. A Model iii. The LB4 response
+object
+
+**3. Spike: Create Sequence in JSLB4**
+
+_Acceptance criteria:_
+
+a. Should be created as a class b. Demonstrate usage with
+[JSLB4 Application class](https://github.com/strongloop/loopback4-example-javascript/blob/class-factory/server/application.js)
+
+**4. Spike: Create Model in JSLB4**
+
+_Acceptance criteria:_
+
+a. Should be created as a class b. Should be automatically loaded in the LB4 app
+c. Should be able to describe model properties d. Should show up on Explorer and
+should be successfully interactive
+
+**5. Spike: Create Repository in JSLB4**
+
+_Acceptance criteria:_
+
+a. Should be created as a class b. Should be automatically loaded in the LB4 app
+c. Should have access to a specified Model d. Should expose CRUD methods to
+interact with the Model e. Should allow custom methods to be added, with access
+to: i. The LB4 request object ii. A Model
+
+**6. Spike: Create Controller in JSLB4**
+
+_Acceptance criteria:_
+
+a. Should be created as a class b. Should be automatically loaded in the LB4 app
+c. Should have access to a specified Repository d. Should expose CRUD methods to
+interact with the Repository e. Should allow custom methods to be added, with
+access to: i. The LB4 request object ii. A Model iii. A Repository iv. The LB4
+response object
+
+I think, once **Spike 1** is sorted out, everything else will come along
+smoothly.