Update Docker configuration and Jenkinsfile for E2E testing

- Added .env.e2e.generated to .gitignore to prevent committing generated environment files.
- Updated docker-compose.yml to use environment variables for Keycloak ports, enhancing flexibility in CI environments.
- Enhanced Jenkinsfile to generate dynamic Keycloak ports for E2E testing and improved logging for troubleshooting during failures.

docker-compose.yml

@@ -107,9 +107,10 @@ services:
       - --http-enabled=true
       - --hostname-strict=false
       - --proxy-headers=xforwarded
+    # Host: KEYCLOAK_HTTP_PORT / KEYCLOAK_MANAGEMENT_PORT (CI, Jenkins) para no chocar con 8080/9000
     ports:
-      - "8080:8080"
-      - "9000:9000"
+      - "${KEYCLOAK_HTTP_PORT:-8080}:8080"
+      - "${KEYCLOAK_MANAGEMENT_PORT:-9000}:9000"
     depends_on:
       postgres-keycloak:
         condition: service_healthy
@@ -240,7 +241,7 @@ services:
       - NODE_ENV=${NODE_ENV:-development}
       - VITE_API_URL=${VITE_API_URL:-http://localhost:8000/api/}
       - INTERNAL_API_URL=${INTERNAL_API_URL:-http://backend:8000/api/}
-      - VITE_KEYCLOAK_URL=${VITE_KEYCLOAK_URL:-http://localhost:8080/kcauth}
+      - VITE_KEYCLOAK_URL=${VITE_KEYCLOAK_URL:-http://localhost:${KEYCLOAK_HTTP_PORT:-8080}/kcauth}
       - VITE_KEYCLOAK_REALM=${VITE_KEYCLOAK_REALM:-master}
       - VITE_KEYCLOAK_CLIENT_ID=${VITE_KEYCLOAK_CLIENT_ID:-anexo76-frontend}
       - KEYCLOAK_URL=${KEYCLOAK_URL:-http://keycloak:8080/kcauth}