Fix URL inclusion

[Natureshadow]

Closes #34.

[codecov-io]

Codecov Report

Merging #35 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #35   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           5      5           
  Lines          47     49    +2     
=====================================
+ Hits           47     49    +2

Impacted Files	Coverage Δ
pwa/app_settings.py	100% <100%> (ø)	⬆️

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[Natureshadow]

@silviolleite Anything keeping this fix from being merged :)?

[silviolleite]