update readme

README.md

@@ -1,39 +1,42 @@
 # Mobicoop V3 - User Service
 
-Mobicoop V3 - User service.
+Mobicoop V3 - User service. Manages user-related data.
 
 ## Installation
 
-```bash
-$ npm install
-```
+You need [Docker](https://docs.docker.com/engine/) and [Docker-compose](https://docs.docker.com/compose/).
 
-## Running the app
+Copy `.env.dist` to `.env` :
 
 ```bash
-# development
-$ npm run start
-
-# watch mode
-$ npm run start:dev
-
-# production mode
-$ npm run start:prod
+cp .env.dist .env
 ```
 
+and modify it to suit your needs.
+
+Then execute :
+
+```bash
+docker-compose up -d
+```
+
+The app runs automatically on the port defined in `SERVICE_PORT` of `.env` file (default : _3001_).
+
 ## Test
 
 ```bash
 # unit tests
-$ npm run test
+docker exec v3_user sh -c "npm run test"
 
 # e2e tests
-$ npm run test:e2e
+docker exec v3_user sh -c "npm run test:e2e"
 
 # test coverage
-$ npm run test:cov
+docker exec v3_user sh -c "npm run test:cov"
 ```
 
+Note : you can run all npm commands directly _outside_ the container (see _scripts_ section of `package.json` for available commands), but you need NodeJS installed locally. We **strongly** advise to install [Node Version Manager](https://github.com/nvm-sh/nvm) !
+
 ## License
 
 Mobicoop V3 - User Service is [AGPL licensed](LICENSE).