WIP: feat: add withServiceMonitor

[revolunet]

add app.withServiceMonitor that adds a prom monitor to /metrics (configurable)

[codecov]

Codecov Report

Merging #237 (6d58002) into beta (b710bc4) will decrease coverage by 1.32%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             beta     #237      +/-   ##
==========================================
- Coverage   40.06%   38.74%   -1.33%     
==========================================
  Files          36       37       +1     
  Lines         292      302      +10     
  Branches       94       99       +5     
==========================================
  Hits          117      117              
- Misses        161      171      +10     
  Partials       14       14              

Impacted Files	Coverage Δ
src/components/app/index.ts	0.00% <0.00%> (ø)
src/utils/getServiceMonitor.ts	0.00% <0.00%> (ø)

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[revolunet]

later

[revolunet]

should also add an exclusion in the ingress rule :

annotations:
  nginx.ingress.kubernetes.io/configuration-snippet: |
    location /metrics {
      deny all;
      return 403;
    }

[douglasduteil]

Needs rebase