Add tulir mautrix-facebook (https://github.com/tulir/mautrix-facebook)

roles/matrix-synapse/templates/ext/mautrix-facebook/systemd/matrix-mautrix-facebook.service.j2

@@ -0,0 +1,34 @@
+#jinja2: lstrip_blocks: "True"
+[Unit]
+Description=Matrix Mautrix Facebook server
+After=docker.service
+Requires=docker.service
+Requires=matrix-synapse.service
+After=matrix-synapse.service
+
+[Service]
+Type=simple
+ExecStartPre=-/usr/bin/docker kill matrix-mautrix-facebook
+ExecStartPre=-/usr/bin/docker rm matrix-mautrix-facebook
+ExecStartPre=/usr/bin/docker run --rm --name matrix-mautrix-facebook-db \
+			--log-driver=none \
+			--user={{ matrix_user_uid }}:{{ matrix_user_gid }} \
+			--cap-drop=ALL \
+			-v {{ matrix_mautrix_facebook_base_path }}:/data:z \
+			{{ matrix_mautrix_facebook_docker_image }} \
+			alembic -x config=/data/config.yaml upgrade head
+ExecStart=/usr/bin/docker run --rm --name matrix-mautrix-facebook \
+			--log-driver=none \
+			--user={{ matrix_user_uid }}:{{ matrix_user_gid }} \
+			--cap-drop=ALL \
+			--network={{ matrix_docker_network }} \
+			-v {{ matrix_mautrix_facebook_base_path }}:/data:z \
+			{{ matrix_mautrix_facebook_docker_image }} \
+			python3 -m mautrix_facebook -c /data/config.yaml
+ExecStop=-/usr/bin/docker kill matrix-mautrix-facebook
+ExecStop=-/usr/bin/docker rm matrix-mautrix-facebook
+Restart=always
+RestartSec=30
+
+[Install]
+WantedBy=multi-user.target