Switch the baseurl with set_api

[akash5100]

• Closes Add a way to change the BASEURL #24

[codecov-commenter]

Codecov Report

Merging #41 (39e33e1) into main (d9c98b4) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main       #41   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           11        12    +1     
  Lines          172       196   +24     
=========================================
+ Hits           172       196   +24     

Impacted Files	Coverage Δ
...py/api_groups/official_clients/get_data_sources.py	100.00% <100.00%> (ø)
hvpy/facade.py	100.00% <100.00%> (ø)
hvpy/io.py	100.00% <100.00%> (ø)
hvpy/parameters.py	100.00% <100.00%> (ø)

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[nabobalis]

This I assume is now not needed?

[dgarciabriseno]

This needs to move to initialize _base_url

[akash5100]

So, I think we will need another function (get_api_url) as you said.
see: #41 (comment)

[dgarciabriseno]

Change PRIVATE_URL to something more specific to hvpy. Remember the environment contains variables that are passed to every program that runs on a system, so "PRIVATE_URL" is too vague.

Let's use HELIOVIEWER_API_URL