`BaseAddress` should be forwarded to http service with non-null value

[ilonatommy]

HttpClient has empty BaseAddress, even though we are setting it in the configuratio:

CashFlowAnalyzer/CashFlowAnalyzer.Client/Program.cs

Line 12 in 0771144

httpClient.BaseAddress = new Uri(builder.HostEnvironment.BaseAddress);

Setting a breakpoint or logging the builder.HostEnvironment.BaseAddress value does not work, so it's hard to define where the value is getting lost.

Temporary workaround for development:

CashFlowAnalyzer/CashFlowAnalyzer.Client/Services/AccountService.cs

Line 14 in 0771144

private string baseAddress = "http://localhost:5130";