EDSC-3817: Adding variables to services

[dpesall]

Overview

What is the feature?

Adding variable associations to services.

What areas of the application does this impact?

Service to Variable associations

Checklist

• I have added automated tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[codecov]

Codecov Report

Merging #64 (c1136a1) into main (d89ade4) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main       #64   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           61        61           
  Lines         1270      1279    +9     
  Branches       162       165    +3     
=========================================
+ Hits          1270      1279    +9     

Files Changed	Coverage Δ
src/resolvers/service.js	100.00% <100.00%> (ø)