feat: build headless theatre laboratory website

backend/entrypoint.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+set -eu
+
+attempt=1
+until python manage.py migrate --noinput; do
+    if [ "$attempt" -ge 10 ]; then
+        echo "Database migrations failed after $attempt attempts." >&2
+        exit 1
+    fi
+    attempt=$((attempt + 1))
+    sleep 2
+done
+
+python manage.py collectstatic --noinput
+exec "$@"