Fix Proxy not working if no api key was set

UmlautAdaptarr/Properties/launchSettings.json

@@ -3,8 +3,7 @@
     "http": {
       "commandName": "Project",
       "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development",
+        "ASPNETCORE_ENVIRONMENT": "Development"
-        "SETTINGS__ApiKey": "test123"
       },
       "_launchUrl": "optionsTODO/example.com/api?t=movie&apikey=132&imdbid=123&limit=100",
       "dotnetRunMessages": true,

UmlautAdaptarr/Services/HttpProxyService.cs

@@ -42,7 +42,7 @@ namespace UmlautAdaptarr.Services
             var bytesRead = await clientStream.ReadAsync(buffer);
             var requestString = Encoding.ASCII.GetString(buffer, 0, bytesRead);
 
-            if (_options.ApiKey != null)
+            if (!string.IsNullOrEmpty(_options.ApiKey))
             {
                 var headers = ParseHeaders(buffer, bytesRead);