Add 'Getting Started' guide (#109)

* Add 'Getting Started' guide

This commit adds 'getting_started.md' which will include various guide
for newcomers although the current version provides guide on docker-based
build only.

Signed-off-by: Jonghyun Park <jh1302.park@samsung.com>
* Fix a typo

* Fix other typos

* Fix a typo (environtment -> environment)

diff --git a/doc/getting_started.md b/doc/getting_started.md
new file mode 100644 (file)
index 0000000..f5834ae
--- /dev/null
+++ b/doc/getting_started.md
@@ -0,0 +1,42 @@
+#### How to build _nncc_ with docker
+
+_nncc_ provides ``Dockerfile`` in order to make it easy to setup development environment.
+
+One may build ``nncc`` docker image with the following command:
+```
+nncc$ cat Dockerfile | docker build -t nncc -
+...
+```
+
+By default, this ``Dockerfile`` uses "archive.ubuntu.com" which may be quite slow. One may use mirror site via ``UBUNTU_MIRROR`` variable.
+For example, one may enable the use of ``kr.archive.ubuntu.com`` via the following command
+```
+nncc$ cat Dockerfile | docker build --build-arg UBUNTU_MIRROR="kr.archive.ubuntu.com" -t nncc -
+...
+```
+
+One who works behind proxy should provide proxy configuration via the following command:
+```
+nncc$ cat Dockerfile | docker build --build-arg HTTP_PROXY=<HTTP proxy address> --build-arg HTTPS_PROXY=<HTTPS proxy address> -t nncc -
+...
+```
+One may use simplified command if ``HTTP_PROXY`` and ``HTTPS_PROXY`` environment variables are already set:
+```
+nncc$ export
+...
+declare -x HTTP_PROXY=...
+declare -x HTTPS_PROXY=...
+...
+nncc$ cat Dockerfile | docker build --build-arg HTTP_PROXY --build-arg HTTPS_PROXY -t nncc -
+...
+```
+
+Note that these configurations are orthogonal to each other. One may freely combine these options as follows:
+```
+nncc$ cat Dockerfile | docker build --build-arg HTTP_PROXY --build-arg HTTPS_PROXY --build-arg UBUNTU_MIRROR="kr.archive.ubuntu.com" -t nncc -
+```
+
+One may easily build _nncc_ with the following command once ``nncc`` docker image is built.
+```
+nncc$ ./nncc docker-build
+```