* Remove add leading `$` from command
* Add copy button from code block
* Using `python -m pip` to install package avoid error
(cherry picked from commit b4eee7edb6)
This patch fix the error release state not work when it set to
offline and submit it to Java gateway, it error because we do
not pass the attribute to Java gateway function
`createOrUpdateProcessDefinition`
close: #9779
(cherry picked from commit 56e0ea802d)
Add a new method to get config from environment variables
and for now, we have three ways to get config and the
priority is `env-var > custom-config-file > built-in-config-file`.
Environment config setting does not work in CLI, because it will
confuse users when they get config value is `var-env` but value
in the configuration file is `var-in-file`, they may not find
the way how to change it
* Add documentation
* Add it to UPDATING.md
close: #8344
Jiajie Zhong
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