* Add missing indexer doc in configuration

* Unify MAX_FILE_SIZE to 1024 * 1024

The makefile did not download the theme if the directory "themes/gitea"
is there, even if empty.
On a fresh Ubuntu install, curl is not included, so the theme rule fails
just after creating the empty directory. When you try again after
installing curl, the rule is not triggered.

This could also happen if the download fails for other reasons.

This change makes the theme rule depend on the file "theme.toml"
which will be there only after unpacking a successfully downloaded
theme archive.

Signed-off-by: Alberto González Palomo <bugs@sentido-labs.com>

* Add defaults to config cheatsheet, and clean up document.

* Updates and touchups, per review.

* support default private when creating or migrating repository

* fix fmt

* use string constants on repository default private in app.ini

* fix fmt

Include defaults in cheat sheet, for that section

original PR go-gitea/docs#147 and author @0xbaadf00d

Gitea now has a forum which is probably a better venue for
these types of conversations

fixes docker build from: #2874

Now that 1.3 is out time tracking is a new feature
go-gitea/docs#148

* import docs into main repository

Signed-off-by: Matti Ranta <matti@mdranta.net>