diff --git a/web/build.sh b/web/build.sh
index 1f3277c..38d02ec 100755
--- a/web/build.sh
+++ b/web/build.sh
@@ -1,6 +1,13 @@
 #!/bin/sh
 # Build the browser version of MRPGI into web/dist/ (self-contained, static).
 # Requires the wasm target: rustup target add wasm32-unknown-unknown
+#
+# Deploy (live at https://monsterrobot.games/engine/):
+#   scp web/dist/* root@100.94.195.115:/opt/dealgod/images/engine/
+# Served by the dealgod-nginx container via a `location /engine/` alias in
+# /opt/dealgod/nginx/dealgod-servers.conf. NOTE: edit that file IN PLACE
+# (python open("w") / tee), never `sed -i` — it's a single-file bind mount
+# and an inode swap desyncs the container until a `docker restart`.
 set -e
 cd "$(dirname "$0")/.."
 cargo build -p mrpgi --release --target wasm32-unknown-unknown