Dockerfile: include git

Closes #221
Closes #230
Closes #203

Install git in the docker container, proposed by #203. While it is possible that issue requires further discussion, this is just a proposal pull request. If that proposal is accepted, here's the pull request.

There is a window between when the stat is made and the result makes it
back to the client where a file is created or deleted and it won't be a
part of that stat.

To fix it, I added a new property signaling that we got some changes
since starting the stat and should run the stat again because we have no
way of knowing whether the currently running stat will include the new
changes or not.

*Total -- 1,393.88kb -> 908.68kb (34.81%)

/doc/assets/chrome_confirm.png -- 34.10kb -> 18.95kb (44.43%)
/doc/assets/server-password-modal.png -- 96.67kb -> 58.14kb (39.86%)
/doc/assets/ide.png -- 984.53kb -> 603.38kb (38.71%)
/doc/assets/chrome_warning.png -- 44.25kb -> 30.03kb (32.14%)
/doc/assets/logo-horizontal.png -- 22.00kb -> 17.48kb (20.55%)
/doc/assets/aws_ubuntu.png -- 51.62kb -> 43.93kb (14.91%)
/doc/assets/cli.png -- 160.70kb -> 136.78kb (14.89%)

It's just fs. Used by fs-extra.

- Move the old data directory if possible.
- Fix extension path to not use a hard-coded path and instead use the
  data directory.
- Create every part of the path during startup.
- Create each path when a connection is made as well in case they are
  deleted while the server is running.
- Create every part of the path before saving settings or writing a file
  using the resource endpoint.

- Fix black text caused by 1.32.0 upgrade.
- Fix various alignment and padding issues (a few elements with more
  space below than above).

* Dockerfile: fix

ENTRYPOINT must be provided in exec form for args
from docker run to be passed correctly.

See https://docs.docker.com/engine/reference/builder/#cmd

* build: fix reuse of vscode repository regression

See #167

fix: missing word

Update docker oneliner and fix clone task

Thanks @ay-b

Add nginx reverse proxy guide for selfhosted

* chore: clone exactly release branch when build

* fix: clone params

It is quite annoying when Ctrl-C does not stop the container

Cannot mount data directory at the moment, we need to make code-server
override all binaries in there instead of reusing and will wait
until the new Dockerfile is pushed before removing the default
entrypoint from README.md

* build: fix yarn corruption issues

Closes #100

Thanks @zerdos

* Dockerfile: add default Entrypoint and mount data dir

Closes #170
Closes #78

Thanks @ay-b

#80

This is the critical piece to let you serve code-server proxied under a
path.  Otherwise if you proxy e.g. `/editor/` thru to
`http://localhost:8000`, everything works fine except the websocket
connection is still opened to `/`

- Simplify the user by opening an issue (giving direction)
- Mark issue label
- Markdown lint
Signed-off-by: NAvelino <t@avelino.xxx>