Fix: URL under Capability Statement not Absolute Uri

[abiisnn]

Description

Fix FHIR specification issue.
Capability statement : The url value in the structure definition needs to be absolute uri.

Link to official docs.

Related issues

Addresses [issue #].

Testing

1. Access the /metadata endpoint on your FHIR Server
2. Check the Url property -- this should be an absolute url

Before

{
    "resourceType": "CapabilityStatement",
    "url": "/metadata",
    "version": "1.0.0.0",
    "name": "Microsoft FHIR Server for Azure 1.0.0 Capability Statement",
    // ....
}

After

{
    "resourceType": "CapabilityStatement",
    "url": "https://localhost:44348/metadata",
    "version": "1.0.0.0",
    "name": "Microsoft FHIR Server for Azure 1.0.0 Capability Statement",
    // ....
}

FHIR Team Checklist

• Update the title of the PR to be succinct and less than 65 characters
• Add a milestone to the PR for the sprint that it is merged (i.e. add S47)
• Tag the PR with the type of update: Bug, Build, Dependencies, Enhancement, New-Feature or Documentation
• Tag the PR with Open source, Azure API for FHIR (CosmosDB or common code) or Azure Healthcare APIs (SQL or common code) to specify where this change is intended to be released.
• CI is green before merge
• Review squash-merge requirements

Semver Change (docs)

Patch|Skip|Feature|Breaking (reason)