Get organization by ID endpoint

[8ivek]

User Story
We need an endpoint v1/organizations/:id that will return an organization array in JSON format.
We already have organizations array in server.js file

unitednepali/server/server.js

Line 5 in 50c12ac

const organizations = []

note: this endpoint will return only one organization with id defined by ":id" in url.

If you have any questions about this issue please slack in (#proj-unitednepali) or comment here.
https://nepalcodes.slack.com/archives/CT5S2H74G

endpoint:
v1/organizations/:id
example: v1/organizations/1
method: GET
response format:

{
	"success": 1,
	"timestamp": "2020-02-16T14:02-0400",
	"results": [
		"organization": [
			{
				....
			}
		]
	]
}

Acceptance Criteria
When querying from rest client (or browser) it should return the organization with the id as an array in JSON format.

Test
Create a test (inside the cypress folder) and make sure the endpoint returns the expected response as above.