The docker started then exited with below log: Seems it related with password but I have no idea where to set it on Synology Docker setting.
[s6-init] making user provided files available at /var/run/s6/etc...exited 0. stdout
10:25:46 [s6-init] ensuring user provided files have correct perms...exited 0. stdout
10:25:46 [fix-attrs.d] applying ownership & permissions fixes... stdout
10:25:46 [fix-attrs.d] done. stdout
10:25:46 [cont-init.d] executing container initialization scripts... stdout
10:25:46 [cont-init.d] add: executing... stdout
10:25:46 Nothing additional to add stdout
10:25:46 [cont-init.d] add: exited 0. stdout
10:25:46 [cont-init.d] userconf: executing... stdout
10:25:46 stdout
10:25:46 stdout
10:25:46 ERROR: You must set a unique PASSWORD (not 'rstudio') first! e.g. run with: stdout
10:25:46 docker run -e PASSWORD=<YOUR_PASS> -p 8787:8787 rocker/rstudio stdout
10:25:46 stdout
10:25:46 stdout
10:25:46 [cont-init.d] userconf: exited 1. stdout
10:25:46 [cont-finish.d] executing container finish scripts... stdout
10:25:46 [cont-finish.d] done. stdout
10:25:46 [s6-finish] syncing disks