message: [generateServerConfig] prevent overwrite server configuration values
diff: @@ -394,11 +394,11 @@ export class GraphQLApp {
  ServerConfiguration extends Partial<BaseServerConfiguration> & IExtraConfig,
  IExtraConfig = Pick<ServerConfiguration, Exclude<keyof ServerConfiguration, keyof BaseServerConfiguration>>
  >(extraConfig?: IExtraConfig): ServerConfiguration {
  - return Object.assign({} as ServerConfiguration, {
  + return Object.assign({} as ServerConfiguration, extraConfig, {
  schema: this.schema,
  typeDefs: this.typeDefs,
  resolvers: this.resolvers,
  context: reqContext => this.buildContext(reqContext.req),
  - }, extraConfig);
  + });
  }
  }
  