diff --git a/conf/systemd.service b/conf/systemd.service
index bb155b7..3ca4c0f 100644
--- a/conf/systemd.service
+++ b/conf/systemd.service
@@ -9,7 +9,7 @@ Group=__APP__
 WorkingDirectory=__FINALPATH__/apps/www/
 Environment="NODE_ENV=production"
 Environment="__YNH_NODE_LOAD_PATH__"
-ExecStart=__YNH_NPM__ start
+ExecStart=yarn start --port=__PORT__
 StandardOutput=append:/var/log/__APP__/__APP__.log
 StandardError=inherit
 
diff --git a/doc/.DS_Store b/doc/.DS_Store
new file mode 100644
index 0000000..c90376b
Binary files /dev/null and b/doc/.DS_Store differ
diff --git a/doc/screenshots/TLDraw screenshot.png b/doc/screenshots/TLDraw screenshot.png
new file mode 100644
index 0000000..6945564
Binary files /dev/null and b/doc/screenshots/TLDraw screenshot.png differ
diff --git a/doc/screenshots/example.jpg b/doc/screenshots/example.jpg
deleted file mode 100644
index a1efa1a..0000000
Binary files a/doc/screenshots/example.jpg and /dev/null differ