documentation changes

README.md

@@ -63,6 +63,17 @@ The classification service relies on two different technologies that are used to
 
 ### How to install
 
+#### Docker installation
+
+The project includes a Dockerfile for running an instance of the requirements-classifier service. In order to build and run the service with Docker, run the following commands:
+
+```docker-compose build```
+```docker-compose up```
+
+You can make sure the Docker image is running successfully by checking the status with:
+
+```docker container ls```
+
 #### Manual installation
 
 The project includes an isolated, integrated version of Hadoop and Mahout. In order to use them, it is necessary to configure the following steps:
@@ -146,24 +157,6 @@ mvn clean install package
 
 Make sure Hadoop is up and running. Otherwise, tests will fail.
 
-#### Docker installation
-
-The project includes a Dockerfile for running an instance of the requirements-classifier service. 
-
-Before running the Docker image, go to the root folder of the repository and edit the required configuration files according to what is described in *Manual Installation > 1. Configuration*:
-
-- *docker/environment.txt*
-- *docker/hadoop-env.sh*  
-- *docker/hdfs-site.xml*
-
-In order to build and run the service with Docker, run the following command:
-
-```docker-compose up```
-
-You can make sure the Docker image is running successfully by checking the status with:
-
-```docker container ls```
-
 ### How to use it
 
 You can take a look at the Swagger documentation [here](https://api.openreq.eu/requirements-classifier/swagger-ui.html), which includes specific, technical details of the REST API to communicate to the service.