ansible/roles/server/node/templates/node.service

[Unit]
Description=node.js on {{ domain }}
After=syslog.target
After=network.target
Requires=mariadb.service

[Service]
Type=simple
User={{ system_user }}
Group={{ system_user }}

WorkingDirectory={{ src }}
ExecStart=/usr/bin/npm start
Environment="USER={{ system_user }}"
Environment="HOME={{ user_directory }}"
Environment="NODE_ENV=production"
Environment="PORT={{ bind_port }}"
Environment="DOMAIN={{ domain }}"
Environment="DATABASE_HOST=127.0.0.1"
Environment="DATABASE_PORT=3306"
Environment="DATABASE_USERNAME={{ database_user }}"
Environment="DATABASE_PASSWORD={{ database_pass }}"
Environment="DATABASE_NAME={{ database_name }}"
{% for name, var in environment_vars.items() %}
Environment="{{ name }}={{ var }}"
{% endfor %}

TimeoutStartSec=2s
TimeoutStopSec=10s
Restart=always
RestartSec=2s
StartLimitInterval=60s
StartLimitBurst=5

[Install]
WantedBy=multi-user.target