Oracle doesn't show up in database connection with docker image(solved)

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Ye， I solved this, by reading this :Connection to Oracle Database - #3 by GorkyV

My /app/plugins directory has no permission to write, and the log in metabase shows:

[df7ff838-bcf6-4230-9169-1320b20f067f] 2020-02-05T00:01:35+08:00 WARN metabase.plugins Metabase cannot use the plugins directory /app/plugins
Please make sure the directory exists and that Metabase has permission to write to it. You can change the directory Metabase uses for modules by setting the environment variable MB_PLUGINS_DIR. Falling back to a temporary directory for now.

So, my be this url can notice newbie to attention on permision?

Thanks.