doc: add in-process option

README.md

@@ -137,6 +137,7 @@ All CLI options are optional:
 --resourceRoutes            Turns on loading of your HTTP proxy settings from serverless.yml
 --useChildProcesses         Run handlers in a child process
 --useDocker                 Run handlers in a docker container.
+--useInProcess              Run handlers in the same process as 'serverless-offline'.
 --webSocketHardTimeout      Set WebSocket hard timeout in seconds to reproduce AWS limits (https://docs.aws.amazon.com/apigateway/latest/developerguide/limits.html#apigateway-execution-service-websocket-limits-table). Default: 7200 (2 hours)
 --webSocketIdleTimeout      Set WebSocket idle timeout in seconds to reproduce AWS limits (https://docs.aws.amazon.com/apigateway/latest/developerguide/limits.html#apigateway-execution-service-websocket-limits-table). Default: 600 (10 minutes)
 --websocketPort             WebSocket port to listen on. Default: 3001