fix: override configuration from flags only if set

[fmartingr]

This pull request checks if the flags provided to the server command has been set (are changed from the default values) before overriding the configuration with their values.

This fixes the configuration not being able to work when using only environment variables, since the default values were always overriden by the flags, regardless of being set up or not.

Ping @tenpai-git

Closes #844

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 19 lines in your changes are missing coverage. Please review.

Project coverage is 25.55%. Comparing base (595cb45) to head (397b772).
Report is 4 commits behind head on master.

❗ Current head 397b772 differs from pull request most recent head 3a929c6. Consider uploading reports for the commit 3a929c6 to get more accurate results

Files	Patch %	Lines
internal/cmd/server.go	0.00%	19 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #865      +/-   ##
==========================================
- Coverage   25.58%   25.55%   -0.04%     
==========================================
  Files          47       47              
  Lines        5628     5636       +8     
==========================================
  Hits         1440     1440              
- Misses       3989     3997       +8     
  Partials      199      199              

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[Monirzadeh]

LGTM and work fine in my system
can you check codecov error before merge this it decrease coverage

[tenpai-git]

Thank you @fmartingr! This looks good to me and is a better solution then deprecating SHIORI_HTTP_PORT.

[fmartingr]

LGTM and work fine in my system can you check codecov error before merge this it decrease coverage

Going to merge this for now so we can release a new dot version. I need to take a look at viper or something that allows us to have both flag and envvars easily.