Set new Nginx values

[ericgaspar]

Problem

• proxy_max_temp_file_size value #38

Solution

• Define less extravagant values for max_temp_file_size and client_max_body_size

PR Status

• [x] Code finished.
• [ ] Tested with Package_check.
• [x] Fix or enhancement tested.
• [x] Upgrade from last version tested.
• [x] Can be reviewed and tested.

Package_check results

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If you have access to App Continuous Integration for packagers you can provide a link to the package_check results like below, replacing '-NUM-' in this link by the PR number and USERNAME by your username on the ci-apps-dev. Or you provide a screenshot or a pastebin of the results

[ericgaspar]

As these two values ​​can cause the installation to fail, I propose to merge this pach to the testing and master branch.

[lapineige]

Done :)