Searching for CVE records by CVE ID (new website v1.0.0)

[athu-tran]

The new CVE website is requesting CVE Services to provide backend support for searching CVE records by ID for the next website release.

Acceptance criteria:
The website makes a GET request and gets back the CVE record or an error response.

Website user story: CVEProject/cve-website#39
CVE Services user story: #341