Adapt CI/CD and endpoint defaults for Sinbad2 production.

Configure GitLab deploy pipeline for this app and switch backend/frontend endpoint defaults from localhost to sinbad2.ujaen.es, including Docker, env files, API client, CORS, and docs.

.gitlab-ci.yml

@@ -0,0 +1,38 @@
+stages:
+  - deploy
+
+variables:
+  APP_NAME: "generadorexamenesllms"
+  BACKEND_PORT: "8074"
+  FRONTEND_PORT: "8075"
+
+deploy_to_sinbad2:
+  stage: deploy
+
+  before_script:
+    - eval $(ssh-agent -s)
+    - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add -
+    - mkdir -p ~/.ssh
+    - chmod 700 ~/.ssh
+    - ssh-keyscan $SSH_HOST >> ~/.ssh/known_hosts
+
+  script:
+    - echo "Enviando código a Sinbad2..."
+    - ssh $REMOTE_USER@$SSH_HOST "mkdir -p ~/deploy_$APP_NAME"
+    
+    - scp -r ./* $REMOTE_USER@$SSH_HOST:~/deploy_$APP_NAME/
+
+    - echo "Levantando contenedores con Docker Compose..."
+    - ssh $REMOTE_USER@$SSH_HOST "
+        cd ~/deploy_$APP_NAME &&
+        docker compose down --remove-orphans &&
+        docker compose build --no-cache frontend backend &&
+        docker compose up -d
+      "
+
+    - echo "Despliegue completado."
+    - echo "Backend  -> http://sinbad2.ujaen.es:$BACKEND_PORT"
+    - echo "Frontend -> http://sinbad2.ujaen.es:$FRONTEND_PORT"
+
+  only:
+    - branches