Add README for docs (#255)

Author: aobolensk

docs/README.md

@@ -0,0 +1,45 @@
+# Parallel Programming Course Documentation
+
+### How to make and test your changes
+
+1. Navigate to the documentation directory:
+```bash
+cd parallel_programming_course/docs
+```
+
+2. (Optional) Create a virtual environment:
+```bash
+python3 -m venv venv
+```
+
+3. Install the required dependencies:
+```bash
+pip install -r requirements.txt
+```
+
+4. Build the documentation:
+```bash
+make html
+```
+
+5. Update the locale files:
+```bash
+make update
+```
+
+6. Re-build the documentation:
+```bash
+make html
+```
+
+7. Make local deployment of the changes:
+```bash
+cd _build/html
+python3 -m http.server 8080
+```
+
+8. Open the documentation in your browser:
+```bash
+open http://localhost:8080/en
+open http://localhost:8080/ru
+```