enable dev|prod envs with simpler env vars system

docker/entrypoint.sh

@@ -1,7 +1,8 @@
 #!/bin/sh
 set -e
 
-PB_DATA=${PB_DATA_DIR:-/app/pb_data}
+# PocketBase data lives on the mounted volume (compose maps ./pb_data → /app/pb_data).
+PB_DATA=/app/pb_data
 
 # Seed a platform superuser from env (idempotent — no-op if it already exists).
 # If PB_EMAIL/PB_PASSWORD aren't set, skip and rely on manual web setup.
@@ -24,7 +25,9 @@ for i in $(seq 1 30); do
 done
 
 # Start the app (frontend + proxy). The proxy auto-runs schema migration.
-PORT=${FRONTEND_PORT:-2080} node /app/frontend/build/index.js &
-PROXY_PORT=${PROXY_PORT:-3456} node /app/proxy/dist/index.js &
+# FRONTEND_PORT/PROXY_PORT are set via ENV in the Dockerfile; adapter-node
+# reads PORT, the proxy reads PROXY_PORT.
+node /app/frontend/build/index.js &
+node /app/proxy/dist/index.js &
 
 nginx -g 'daemon off;'