fix: non-POSIX-compliant script that worked on Alpine but causes issues on Debian (wtf!)

Author: joshunrau

apps/gateway/scripts/run.sh

@@ -1,10 +1,12 @@
 #!/bin/sh
 
+set -eu
+
 DATABASE_FILE=${GATEWAY_DATABASE_URL#file:}
 EMPTY_DATABASE_FILE="/app/gateway.tmpl.db"
 
-if [[ ! -f "$DATABASE_FILE" ]]; then
+if [ ! -f "$DATABASE_FILE" ]; then
   cp "$EMPTY_DATABASE_FILE" "$DATABASE_FILE"
 fi
 
-node ./dist/main.js
+exec node ./dist/main.js