README inital version

README.md

@@ -22,12 +22,24 @@ A client named `ujse` and with the `citizen` role within the realm to be used fo
 
 
 ## Installation
+### Get code
 Clone this repository:
 
 ``` bash
 git clone https://git.code.tecnalia.com/across/public/user-journey-service-delivery/user-journey-services-engine.git
 ```
 
+### Configure properties files
+Check the following `*.env` files and change the property values as required:
+- ./ujse.env: this file contains properties to be used when creating the UJSE container and related to:
+  - the information required to connect to the PostgreSQL DB.
+  - Some URL-s of the Identity Server (keycloak) to connect to.
+  - Some URL-s of the Service Catalogue HTTP API.
+  - The main URL of the TD HTTP API.
+- ./postgres.env: this file contains the properties related to the PostgreSQL DB, as the username and password, and to be used for creating the DB container.
+
+
+### Start containers
 Create and start the containers specified in the docker-compose.yml file:
 
 ``` bash