springboot app

Use the latest version of all existing tech

Technology:
- Groovy as the language // don't use 3.x, it's beta still
- Springboot as the framework
- Gradle for building

Business Requirements:
Create an API that takes manages products.
- Can create object
- Can get object

Technical Requirements:
- one controller `com.x.y.appname.controller.ProductController` to handle api requests. 
- one service to handle the products - `com.x.y.appname.service.ProductService`
- one model for a product - `com.x.y.appname.model.Product`
- for now you don't need to have a database, just get something you can make a request to and it can serve hard coded data

example json:
```
{
	"id": "something",
	"name": "Super Soaker 3000",
	"price": 50.00,
	"inventory": 100
}
```

controller endpoints:
```
to get the product with an identifier of 123:
GET /products/123

to make a new product:
POST /products with the above json as the request body
```

Requirements:
- run `./gradlew clean build` to run a build of the app
- run `./gradlew bootRun` to run the app
- send the above example requests and have things work

resources:
this will be your best starting point: https://start.spring.io/ (choose gradle, groovy, springboot 2.1.7)
https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/
almost anything spring related you google will have a result from https://www.baeldung.com
https://www.baeldung.com/spring-boot-start (note, his example uses maven. you should use gradle! 
- on this you can skip sections 4, 5, and 6, 8, and 9. we'll do some of this later