Update readme

README.md

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 Assignment description goes here...
 
+## Getting started
+
+1. Create a new repository using the template
+2. Clone it to your local machine
+3. Create a new topic branch (!!!DO NOT WORK IN MASTER DIRECTLY!!!)
+4. Prepare the assignment instruction
+5. Provide the solution in a separated document
+6. Prepare a code boilerplate
+7. Add unit tests (use `unittest` framework only)
+8. Open a PR into master to merge assignment branch
+
+### Make your boilerplate file invisible for Git
+
+When a boilerplate code is ready, you may want to implement the actual logic
+for the assignment. To make changes inside a file invisible for Git use:
+
+```shell
+git update-index --assume-unchanged <file>
+```
+
+To switch it back:
+
+```shell
+git update-index --no-assume-unchanged <file>
+```
+
+### Testing
+
+Assignment follows TDD approach. This means all the tests should fail.
+Decorate your test cases with `unittest.expectedFailure`.
+
 [//]: # (TODO: assignment documents)
-[//]: # (TODO: publication checklist)
+
 
 ## Publication checklist