add information about how to set up de env dev

Author: nicolsss

README.md

@@ -85,6 +85,12 @@ Yo have 2 ways to run this project in dev mode:
 - In your project path, open your favourite command line and run the follwing commands: `make build` then `make run` and finally `make logs`. When the project is successfully compiled you can go to `http://localhost:4200/` in your browser. Remember you must have your Docker running.
 
 **Second**:
+- First you need to set de environment variables using the next commands
+```bash
+set -a
+source .env
+set +a
+```
 - Run `ng serve` to run the app in dev mode. After executing this command, you can navigate to `http://localhost:4200/` to see the app working. This method is usefull when you want to run a specific branch using less time but not recommended when doing QA.
 
 In any case, the app will automatically reload if you change anything in the source files.