Add ability to use appsettings.json

https://github.com/Jackett/Jackett/issues/3583

src/Jackett.Server/Program.cs

@@ -107,6 +107,7 @@ namespace Jackett.Server
 
             var builder = new ConfigurationBuilder();
             builder.AddInMemoryCollection(runtimeDictionary);
+            builder.AddJsonFile(Path.Combine(configurationService.GetAppDataFolder(), "appsettings.json"), optional: true);
 
             Configuration = builder.Build();
 
@@ -179,11 +180,11 @@ namespace Jackett.Server
 
         public static IWebHostBuilder CreateWebHostBuilder(string[] args, string[] urls, string contentRoot) =>
             WebHost.CreateDefaultBuilder(args)
-                .UseConfiguration(Configuration)
                 .UseContentRoot(contentRoot)
                 .UseWebRoot(contentRoot)
                 .UseUrls(urls)
                 .PreferHostingUrls(true)
+                .UseConfiguration(Configuration)
                 .UseStartup<Startup>()
                 .UseNLog();
     }

src/Jackett.Server/appsettings.Development.json

@@ -1,10 +0,0 @@
-{
-  "Logging": {
-    "IncludeScopes": false,
-    "LogLevel": {
-      "Default": "Debug",
-      "System": "Information",
-      "Microsoft": "Information"
-    }
-  }
-}

src/Jackett.Server/appsettings.json

@@ -1,15 +0,0 @@
-{
-  "Logging": {
-    "IncludeScopes": false,
-    "Debug": {
-      "LogLevel": {
-        "Default": "Warning"
-      }
-    },
-    "Console": {
-      "LogLevel": {
-        "Default": "Warning"
-      }
-    }
-  }
-}

src/Jackett.Updater/Program.cs

@@ -233,6 +233,8 @@ namespace Jackett.Updater
                 "Definitions/torrentwtf.yml",
                 "Definitions/eotforum.yml",
                 "Definitions/nexttorrent.yml",
+                "appsettings.Development.json",
+                "appsettings.json",
             };
 
             foreach (var oldFile in oldFiles)