Add default vars and service template

defaults/main.yml

 ---
 # defaults file for uwazi-lqdn
+
+uwazi_version: "latest"
+uwazi_node_env: "production"
+uwazi_source_url: "https://github.com/huridocs/uwazi/archive/refs/tags/{{ uwazi_version }}.zip"
+uwazi_bdd_name: "uwazi-bdd"
+uwazi_index_name: "default-uwazi-name"
+uwazi_port: 40002
+uwazi_upload_folder: "/srv/uwazi/uploads"
+uwazi_log_dir: "/var/log/uwazi"         # Folder
+uwazi_donwload_location: "/tmp/uwazi"   # Folder
+uwazi_install_location: "/srv/uwazi"    # Folder
+uwazi_server_code: "/usr/bin/node {{uwazi_install_location}}/server.js"

templates/uwazi.service.j2

+[Unit]
+Description=Uwazi
+After=network.target
+
+[Service]
+Environment=DBHOST=localhost
+Environment=NODE_ENV={{ uwazi_node_env }}
+Environment=DATABASE_NAME={{ uwazi_bdd_name }}
+Environment=ELASTICSEARCH_URL=http://elasticsearch:9200
+Environment=INDEX_NAME={{ uwazi_index_name }}
+Environment=PORT={{ uwazi_port }}
+Environment=UPLOADS_FOLDER={{ uwazi_upload_folder }}
+Environment=LOGS_DIR={{ uwazi_log_dir }}
+
+WorkingDirectory={{ uwazi_install_location }}
+ExecStart={{ uwazi_server_code }}
+
+Restart=always
+RestartSec=30s
+TimeoutSec=60s
+User=uwazi
+
+[Install]
+WantedBy=multi-user.target