Fix nginx variable service_port (nginx)

[aledbf]

What this PR does / why we need it:

Right now the generates nginx.conf contains set $service_port "{ 0 0}";

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf

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[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@8740c1b). Click here to learn what that means.
The diff coverage is 28.57%.

@@            Coverage Diff            @@
##             master    #4500   +/-   ##
=========================================
  Coverage          ?   59.16%           
=========================================
  Files             ?       89           
  Lines             ?     6779           
  Branches          ?        0           
=========================================
  Hits              ?     4011           
  Misses            ?     2336           
  Partials          ?      432

Impacted Files	Coverage Δ
internal/ingress/types_equals.go	17.39% <0%> (ø)
internal/ingress/controller/template/template.go	78.63% <33.33%> (ø)

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