Add demo app deployment

[VMelnalksnis]

Changes proposed in this pull request:

• Deploy demo app on each release

[codecov]

Codecov Report

Merging #450 (2d26626) into master (79c8c10) will increase coverage by 0.01%.
The diff coverage is 9.52%.

@@            Coverage Diff             @@
##           master     #450      +/-   ##
==========================================
+ Coverage   66.03%   66.05%   +0.01%     
==========================================
  Files         269      269              
  Lines        7517     7515       -2     
  Branches      527      527              
==========================================
  Hits         4964     4964              
+ Misses       2380     2378       -2     
  Partials      173      173              

Impacted Files	Coverage Δ
.../Gnomeshade.WebApi/Configuration/SwaggerOptions.cs	0.00% <0.00%> (ø)
...e.WebApi/V1_0/Accounts/CounterpartiesController.cs	93.02% <ø> (ø)
source/Gnomeshade.WebApi/V1_0/CreatableBase.cs	93.10% <ø> (ø)
...WebApi/V1_0/OpenApi/SwaggerGenOptionsExtensions.cs	0.00% <0.00%> (ø)
...shade.WebApi/V1_0/Products/CategoriesController.cs	80.00% <ø> (ø)
...meshade.WebApi/V1_0/Products/ProductsController.cs	97.22% <ø> (ø)
...Gnomeshade.WebApi/V1_0/Products/UnitsController.cs	96.42% <ø> (ø)
...eshade.WebApi/V1_0/Transactions/LoansController.cs	83.33% <ø> (ø)
...de.WebApi/V1_0/Transactions/PurchasesController.cs	83.33% <ø> (ø)
...WebApi/V1_0/Transactions/TransactionsController.cs	91.30% <0.00%> (-0.81%)	⬇️
... and 3 more

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