Run as root so the app can write SQLite to the root-owned /app/data volume

Dockerfile

@@ -9,9 +9,11 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Copy app
 COPY app/ ./app/
 
-# Cloudron runs as UID 1000
-RUN mkdir -p /app/data && chown -R 1000:1000 /app/data /app/code
-USER 1000
+# Run as root (the base image default). Cloudron's sandboxing (read-only
+# rootfs, AppArmor, dropped capabilities) still applies to root inside the
+# container, and /app/data is mounted as a root-owned volume, so running as
+# root is required for the app to write its SQLite store there.
+RUN mkdir -p /app/data
 
 EXPOSE 8000