feat(*): Perform initial setup

This involves setting up the config file and the httpclient.

CityFinder/CityFinder.csproj

@@ -5,6 +5,24 @@
     <TargetFramework>net5.0</TargetFramework>
   </PropertyGroup>
 
+  <ItemGroup>
+    <None Remove="appsettings.json" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Include="appsettings.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Configuration" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.FileExtensions" Version="5.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="5.0.0" />
+  </ItemGroup>
+
   <ItemGroup>
     <Compile Update="Program.cs">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>

CityFinder/Program.cs

@@ -29,7 +29,26 @@ namespace CityFinder
 {
     internal class Program
     {
+        private static readonly HttpClient client = new HttpClient();
+        private static IConfigurationRoot config;
         private static async Task Main(string[] args)
         {
+            InitialSetup();
+
+        /// <summary>
+        /// This method sets up the json config file and sets the user-agent header on the HttpClient.
+        /// </summary>
+        private static void InitialSetup()
+        {
+            // Set up handling json config files
+            IConfigurationBuilder builder = new ConfigurationBuilder()
+                .AddJsonFile($"appsettings.json", true, true)
+                .AddEnvironmentVariables();
+            config = builder.Build();
+
+            // Set default user-agent on the HttpClient to enable using the Google API from code
+            client.DefaultRequestHeaders.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.212 Safari/537.36");
         }
+        }
+    }
 }

CityFinder/appsettings.json

@@ -0,0 +1,3 @@
+{
+  "GoogleMapsGeocodeApiKey": "your-key-goes-here"
+}