zeppelin/docs/setup/basics
andrea f238ca0e3f [ZEPPELIN-2766] Make online resources url configurable at compile time
### What is this PR for?
At compile time Zeppelin is downloading several external resources.
I want to be able to provide alternative URLs to compile when internet is not available(i.e. behind corporate proxy).

### What type of PR is it?
[Improvement]

### What is the Jira issue?
[ZEPPELIN-2766]

### How should this be tested?
```
mvn -DskipTests -Dplugin.frontend.downloadRoot=<alernative-url> -Dplugin.frontend.nodeDownloadRoot=<alernative-url> -Dplugin.frontend.yarnDownloadRoot=<alernative-url> -Dplugin.frontend.npmDownloadRoot=<alernative-url> -Dpypi.repo.url=<alernative-url> clean package
```

### Questions:
* Does the licenses files need update? NO
* Is there breaking changes for older versions? NO
* Does this needs documentation? NO

Author: andrea <andrea.peruffo1982@gmail.com>

Closes #2483 from andreaTP/softCodeRepos and squashes the following commits:

6894bcd5 [andrea] added docs for additional configurations
647417c3 [andrea] fix typo
1e5fd85f [andrea] remove deprecated downloadRoot
0aea864a [andrea] Keep online resources configurable
2017-08-08 11:21:15 +09:00
..
how_to_build.md [ZEPPELIN-2766] Make online resources url configurable at compile time 2017-08-08 11:21:15 +09:00
multi_user_support.md [ZEPPELIN-2596] Improving documentation page 2017-06-23 17:44:13 +09:00