Add EnvironmentVariablesPrefix to ConfigurationBuilderOptions.

framework/src/Volo.Abp.Core/Microsoft/Extensions/Configuration/ConfigurationBuilderOptions.cs

@@ -30,5 +30,10 @@ namespace Microsoft.Extensions.Configuration
         /// Base path to read the configuration file indicated by <see cref="FileName"/>.
         /// </summary>
         public string BasePath { get; set; }
+
+        /// <summary>
+        /// Prefix for the environment variables.
+        /// </summary>
+        public string EnvironmentVariablesPrefix { get; set; }
     }
 }

framework/src/Volo.Abp.Core/Microsoft/Extensions/Configuration/ConfigurationHelper.cs

@@ -23,7 +23,7 @@ namespace Microsoft.Extensions.Configuration
                 builder = builder.AddJsonFile($"{options.FileName}.{options.EnvironmentName}.json", optional: true, reloadOnChange: true);
             }
             
-            builder = builder.AddEnvironmentVariables();
+            builder = builder.AddEnvironmentVariables(options.EnvironmentVariablesPrefix);
 
             if (options.EnvironmentName == "Development")
             {