Dockerize: self-contained stack + B2 backup sidecar

entrypoint.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+# Runs before the app starts. Ensures the data dir exists and runs DB
+# migrations if the app uses them. Uncomment the lines that apply.
+set -e
+
+mkdir -p /data/uploads/suggestions
+
+# --- Database migrations (pick what the app uses, leave the rest commented) ---
+# Flask-Migrate / Alembic via Flask:
+#   flask db upgrade
+# Raw Alembic:
+#   alembic upgrade head
+# Django:
+#   python manage.py migrate --noinput
+#   python manage.py collectstatic --noinput
+# Plain SQLite with a schema file (only first run):
+#   [ -f /data/app.db ] || sqlite3 /data/app.db < schema.sql
+
+exec "$@"