feat(synapse): add deployment method virtualenv

roles/synapse/templates/synapse.service.j2

@@ -0,0 +1,22 @@
+[Unit]
+Description="{{ synapse_systemd_unit_description }}"
+
+{% if synapse_systemd_unit_after | default([]) | length > 0 %}
+After={{ synapse_systemd_unit_after | join(' ') }}
+{% endif %}
+{% if synapse_systemd_unit_wants | default([]) | length > 0 %}
+Wants={{ synapse_systemd_unit_wants | join(' ') }}
+{% endif %}
+
+[Service]
+Type={{ synapse_systemd_service_type }}
+WorkingDirectory={{ synapse_venv_path }}
+ExecStart={{ synapse_systemd_service_exec_start }}
+
+User={{ synapse_run_user }}
+Group={{ synapse_run_group }}
+
+Restart={{ synapse_systemd_service_restart }}
+
+[Install]
+WantedBy={{ synapse_systemd_install_wanted_by }}