README.sh: add setup info

Signed-off-by: Maciej Pijanowski <maciej.pijanowski@3mdeb.com>

.gitignore

@@ -0,0 +1 @@
+dts/dts-base-image-v*.wic

README.md

@@ -25,6 +25,15 @@ We do not use
 [remote in git-annex](https://git-annex.branchable.com/special_remotes/) right now, we
 rely on URLs prepare beforehand. It may change in the future.
 
+## Setup this repo
+
+* After cloning, execute following to finalize test data setup:
+
+```bash
+git annex pull
+./setup.sh
+```
+
 ## Common actions
 
 * Add new file from URL:

setup.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+# Various setup actions after cloning this repo to fully prepare data for
+# testing
+
+
+# dts
+if pushd dts; then
+  gzip -cdk dts-base-image-v2.1.3.wic.gz > dts-base-image-v2.1.3.wic
+  popd
+fi