implemented retrieval of connection string from appsettings.json rather than being hardcoded (#111)

Thanks!

src/CleanArchitecture.Infrastructure/StartupSetup.cs

@@ -6,8 +6,8 @@ namespace CleanArchitecture.Infrastructure
 {
 	public static class StartupSetup
 	{
-		public static void AddDbContext(this IServiceCollection services) =>
+		public static void AddDbContext(this IServiceCollection services, string connectionString) =>
 			services.AddDbContext<AppDbContext>(options =>
-				options.UseSqlite("Data Source=database.sqlite")); // will be created in web project root
+				options.UseSqlite(connectionString)); // will be created in web project root
 	}
 }

src/CleanArchitecture.Web/Startup.cs

@@ -31,7 +31,10 @@ namespace CleanArchitecture.Web
 				options.MinimumSameSitePolicy = SameSiteMode.None;
 			});
 
-			services.AddDbContext();
+			string connectionString = Configuration.GetConnectionString("SqlLiteConnection");  //Configuration.GetConnectionString("DefaultConnection");
+
+
+			services.AddDbContext(Configuration.GetConnectionString(connectionString));
 
 			services.AddControllersWithViews().AddNewtonsoftJson();
 			services.AddRazorPages();

src/CleanArchitecture.Web/appsettings.json

 {
   "ConnectionStrings": {
-    "DefaultConnection": "Server=(localdb)\\v11.0;Database=cleanarchitecture;Trusted_Connection=True;MultipleActiveResultSets=true"
+    "DefaultConnection": "Server=(localdb)\\v11.0;Database=cleanarchitecture;Trusted_Connection=True;MultipleActiveResultSets=true",
+    "SqlLiteConnection": "Data Source=database.sqlite"
   },
   "Logging": {
     "IncludeScopes": false,