Implement API: GET /gis/location/nearest

[dadiorchen]

To implement an endpoint:

treetracker-query-api/docs/api/spec/query-api.yaml

Lines 549 to 577 in 1c7c606

	/gis/location/nearest:
	get:
	summary: get nearest gis location by filter/parameters
	operationId: get-gis-location-nearest
	responses:
	'200':
	description: OK
	content:
	application/json:
	schema:
	$ref: '#/components/schemas/location'
	parameters:
	- schema:
	type: integer
	minimum: 1
	maximum: 18
	in: query
	name: zoomlevel
	description: the map zoomlevel
	- schema:
	type: float
	in: query
	name: lat
	description: the latitude
	- schema:
	type: float
	in: query
	name: lon
	description: the longitude

• Please write an e2e test to cover it.
• Please follow the guide in the 'readme' to follow our architecture on the server-side.

---

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• Please read our readme for more information/guide/tutorial.
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[dadiorchen]

Refer to this: https://github.com/Greenstand/treetracker-web-map-api/blob/master/src/api/nearest.js