Clean workspace and add some comments

Jenkinsfile

@@ -8,11 +8,13 @@ pipeline {
     stages {
         stage('Build Environmen') {
             steps {
+                # Build environment
                 sh 'docker compose up --build -d' 
             }
         }
         stage('Install dependencies') {
             steps {
+                # Install dependencies
                 sh 'docker exec ogcore-php composer install'
                 sh 'docker exec ogcore-php php bin/console lexik:jwt:generate-keypair --overwrite' 
                 sh 'docker exec ogcore-php php bin/console doctrine:migrations:migrate --no-interaction'
@@ -21,16 +23,21 @@ pipeline {
         }
         stage('Tests') {
             steps {
+                # Run tests
                 sh 'docker compose exec php bin/phpunit --log-junit phpunit.xml'
             }
         }
     }   
     post {
         always {
+            # Publish JUnit test results
             xunit (
                 thresholds: [ skipped(failureThreshold: 0) , failed(failureThreshold: 0) ], 
                 tools: [ PHPUnit(pattern: 'phpunit.xml') ]
             )
+            # Remove containers
+            sh 'docker compose down'
+            sh 'docker compose rm -f'
         }
     }
 }