fix: relay all container output to STDERR

Author: themightychris

lib/Studio.js

@@ -26,7 +26,7 @@ function execDocker(args, options = { }) {
         }
 
         if (options.$relayStdout) {
-            dockerProcess.stdout.pipe(process.stdout);
+            dockerProcess.stdout.pipe(process.stderr);
         }
 
         let stdout = '';