Add service-ruby subproject

[yoomlam]

Ticket: #61

Add service-ruby subproject, which:

• ports over pdf generation and health data assessment Ruby code from the RRD prototype to VRO
• adds containers to the app subproject

To run only the subproject: ./gradlew :service-ruby:dockerComposeUp
To test, send RabbitMQ messages using scripts in the examples directory:

cd service-ruby
examples/assess.rb
# Expect some result
Waiting for reply within 5 seconds
 Received reply: {
  "bp_readings": [
    {
      "effectiveDateTime": "2022-04-18",
      "practitioner": "DR. THOMAS359 REYNOLDS206 PHD",
      "organization": "LYONS VA MEDICAL CENTER",
      "systolic": {
        "code": "8480-6",
        "display": "Systolic blood pressure",
        "unit": "mm[Hg]",
        "value": 175.0
      },
      "diastolic": {
        "code": "8462-4",
        "display": "Diastolic blood pressure",
        "unit": "mm[Hg]",
        "value": 111.0
      }
    }
  ]
}
correlation_id: 2022-05-31 15:07:05 -0500

examples/generate_pdf.rb
# Expect some result
Waiting for reply within 5 seconds
 Received reply: {
  "filename": "rrd-pdf-1654027657.pdf"
}
correlation_id: 2022-05-31 15:07:38 -0500
Closing

When you run the app (./gradlew :app:dockerComposeUp), a service-ruby container will be included.

[yoomlam]

I use portainer for a nice docker UI: