[ZEPPELIN-585] Add new doc on how to embed Note\Paragraph plots into …

[AhyoungRyu]

What is this PR for?

Sorry for the late PR.

According to the user feedback, seems that it's not clear how to embed output plots into other websites.
So I made a documentation for explaining this feature.

What type of PR is it?

Documentation

Todos

• - Write a documentation for How can we publish Zeppelin paragraph results

Is there a relevant Jira issue?

ZEPPELIN-585

How should this be tested?

After apply this PR, just click `Quick Start -> Publish your Paragraph

Screenshots (if appropriate)

Questions:

• Does the licenses files need update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No

[felixcheung]

I think changing host name only necessary if someone is running Zeppelin locally (like a laptop) but want it to be accessible outside of it? In normal use cases, Zeppelin should be running on a server?

[AhyoungRyu]

@felixcheung You're right. I think I have to change this line for the normal use case : )

[AhyoungRyu]

@felixcheung Thank you for the review. I changed some sentences as your comments.

[felixcheung]

I'm not sure what's the right name for it, maybe it's not a 'tab'? Is it a menu item?

[AhyoungRyu]

@felixcheung I applied it too : )

[felixcheung]

looks good.

[corneadoug]

please checkout [here]
--> please visit [this page]

[corneadoug]

We might want to add some kind of disclaimer because of security issues with that feature:

• To embed the paragraph in a website, Zeppelin needs to reachable for that Website.
• With that iframe url, anybody that visit the website might be able to access Zeppelin if the allow-access is not properly set
• I'm not sure that this feature works if Shiro is activated on Zeppelin

[AhyoungRyu]

@corneadoug
I applied your first issue.
However, so far, I'm not sure how we can deal with the second one. I just addressed as the current status of Zeppelin in this documentation.
And I think the third one needs to be tested. So I'll test it and ping this PR again : )

[felixcheung]

"Zeppelin needs to be reachable for that Website" is probably better

[AhyoungRyu]

@felixcheung Shamed. You're right. A verb is needed after to. I pushed it again : )

[AhyoungRyu]

@corneadoug Sorry for the late response. I tested this feature with Shiro on. If Shiro is activated, the user need to enter userid & password in their website like below image.

Then, after loggin in, the published paragraph is shown.

Therefore, if anyone want to show their Zeppelin paragraph in their outside website, they need to deactivate Shiro authentication. (Actually, Shiro is deactivated by default until the user activate it on purpose.)
Do I need to address this issue in the docs?

[corneadoug]

reachable for -> reachable by

[AhyoungRyu]

@corneadoug Thanks! I added a warning sentence to this docs as you said.

[corneadoug]

LGTM

[felixcheung]

merging then...