upd(docs): readme proj + backend

README.md

@@ -1,14 +1,26 @@
 # Train platform
+
 Проект по разработке веб-приложения для организации тренировочных курсов с элементами геймификации.
 
+Процесс командной разработки можно отследить на [канбан доске.](https://github.com/orgs/TeamHSE/projects/1/views/1)
 
 # Quick start
 
 Запуск проекта:
-- backend: [http://localhost:3000](http://localhost:3000)
-- frontend: [http://localhost:3001](http://localhost:3001)
+1. Run ```docker compose up -d```
+2. Application is available at:
+   - backend: [http://localhost:3000](http://localhost:3000/)
+   - frontend: [http://localhost:3001](http://localhost:3001/)
+
+
+# About
+
+- [API DOCS](https://github.com/TeamHSE/train-platform/wiki/Endpoints)
+- [Development Agreement](https://github.com/TeamHSE/train-platform/wiki/Dev-Experience)
+- [Buisness model](https://github.com/TeamHSE/train-platform/wiki/Business-model)
+- [UI](https://www.figma.com/file/K5YbaVEbehlOig6ZWo1Mft/HSE-Project?type=design&node-id=0%3A1&mode=design&t=ecU1TQEZhG9LRVbk-1)
 
+# Technical report
 
-```
-docker-compose up --build
-```
+- [Frontend](https://github.com/TeamHSE/train-platform/blob/develop/frontend/README.md)
+- [Backend](https://github.com/TeamHSE/train-platform/blob/develop/backend/README.md)

backend/README.md

@@ -1,10 +1,44 @@
-# Как отпарвить изменения в репозиторий
+# About
 
-- Отформатировать код
-- Запустить линтер
-    - Исправить замечания линтера
-- Запустить тесты
-- Комит и пуш в репозиторий
+Backend WEB API application using:
+- Express
+- Typescript
+- Postgres
+- TypeORM
+- pnpm
+
+# Quick start
+### Local
+1. Install dependencies
+  ```pnpm i```
+   - Install postgres:
+     - add to [config](./src/config/Config.ts) connection params
+       - set param at [db.ts DataSource](./src/db.ts)
+       ```synchronize: true```
+
+   - Generate RSA keys for JWT authentication _(terminal / git bash script below)_
+        ```
+       mkdir -p src/config \
+       && openssl genpkey -algorithm RSA -out src/config/private.pem -pkeyopt rsa_keygen_bits:2048 \
+       && openssl rsa -pubout -in src/config/private.pem -out src/config/public.pem \
+       && chmod 644 src/config/private.pem src/config/public.pem \
+       ```
+2. Start backend:
+   - Production ready: 
+      ```pnpm start```
+   - Development with hot reloading by Nodemon:
+      ```pnpm dev```
+3. Listen [localhost:3000/](http://localhost:3000/)
+
+
+# Contribution
+
+- Reformat code
+- Lint
+    - fix linter issues
+- Test
+- Commit and push branch
+- Create PR and ask review
 
 ```
 npm prettify