Using a proxy function instead a redirect as handler

[joselsegura]

Description

This commit makes that smart proxy perform requests to content service and aggregator and then return the response to the client.

Fixes #16

Type of change

• Refactor (refactoring code, removing useless files)

Testing steps

Regular CI

[codecov-commenter]

Codecov Report

Merging #17 into master will not change coverage.
The diff coverage is 52.94%.

@@           Coverage Diff           @@
##           master      #17   +/-   ##
=======================================
  Coverage   20.31%   20.31%           
=======================================
  Files           9        9           
  Lines         507      507           
=======================================
  Hits          103      103           
  Misses        391      391           
  Partials       13       13           

Impacted Files	Coverage Δ
server/endpoints.go	60.00% <52.94%> (ø)
server/server.go	20.00% <0.00%> (ø)

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[tisnik]

LGTM

[Serhii1011010]

Looks great