Create a service for a common http interface

[a3957273]

In our default implementation it's not particularly useful, but does allow us a central place to add in deployment specific configuration for network communication.

[ARADDCC012]

Do we want to create a new agent on every call to this function or should we be reusing a single agent?

Could do something like:

// Not sure what the correct type is off the top of my head
let httpsAgent: HttpsAgent | undefined

export function getHttpsAgent(config?: https.AgentOptions) {
  if (!httpsAgent) {
    httpsAgent = new https.Agent({ ...config })
  }
  return httpsAgent
}