[PATCH 2/2] doc: add isar build in docker instructions

["Maxim Yu. Osipov" <mosipov@ilbers.de>]

Signed-off-by: Maxim Yu. Osipov <mosipov@ilbers.de>
---
 doc/docker_build.md | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 doc/docker_build.md

diff --git a/doc/docker_build.md b/doc/docker_build.md
new file mode 100644
index 0000000..7471f2d
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+++ b/doc/docker_build.md
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+# Building ISAR in Docker
+
+ISAR docker's images are public.
+
+## Install Docker 
+
+Follow the instructions on https://docs.docker.com/install
+
+## Build ISAR in Docker
+
+Try the following command on your Linux host running docker:
+
+```
+$docker run -e USER_ID=$(id -u) --rm -t -i --cap-add=SYS_ADMIN --device $(/sbin/losetup -f) kasproject/kas-isar bash
+```
+
+You will see someting like:
+
+```
+Unable to find image 'kasproject/kas-isar:latest' locally
+latest: Pulling from kasproject/kas-isar
+b0568b191983: Pull complete 
+4275668792f8: Pull complete 
+f20834504b2f: Pull complete 
+8fc4f86edf96: Pull complete 
+abfe5b5ad18a: Pull complete 
+a903a3cbb4d5: Pull complete 
+2bd66d0e3147: Pull complete 
+cdd19e96269b: Pull complete 
+fbb3475f667d: Pull complete 
+89116d7487d0: Pull complete 
+Digest: sha256:7cfee2a6ac9a197e9d1bead0091854f2a53ca90a12453d21264dba525670fba5
+Status: Downloaded newer image for kasproject/kas-isar:latest
+builder@ce7cfc1d57db:~$
+```
+
+Clone the isar repository and launch build for target isar image name:
+
+```
+builder@ce7cfc1d57db:~$ git clone https://github.com/ilbers/isar.git
+
+builder@ce7cfc1d57db:~$ cd isar/
+
+builder@ce7cfc1d57db:~/isar$ . ./isar-init-build-env ../build
+builder@ce7cfc1d57db:~/build$ bitbake <isar-image-name>
+```
-- 
2.11.0