修改环境变量检查配置

OTWebSocket.API/Program.cs

@@ -28,7 +28,8 @@ namespace OTWebSocket.API
             NLogBuilder.ConfigureNLog($"nlog.config");
             ConfigurationBuilder configurationBuilder = new ConfigurationBuilder();
             string settingsFileName = "appsettings.json";
-            if (Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT").Equals("Development"))
+            var env = Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT");
+            if (!string.IsNullOrEmpty(env) &&env.Equals("Development"))
             {
                 settingsFileName = "appsettings.Development.json";
             }