fix: use /tmp/crontabs for read-only root filesystem

entrypoint.sh

@@ -18,18 +18,18 @@ echo "[entrypoint] Starting up at $(date)"
 CLEANUP_CRON_SCHEDULE="${CLEANUP_CRON_SCHEDULE:-0 */6 * * *}"
 CLEANUP_STARTUP_DELAY="${CLEANUP_STARTUP_DELAY:-10}"
 
-mkdir -p /tmp/logs /etc/crontabs
+mkdir -p /tmp/logs /tmp/crontabs
 
-# Write crontab
-cat > /etc/crontabs/root << EOF
+# Write crontab to /tmp (HuggingFace root filesystem is read-only)
+cat > /tmp/crontabs/root << EOF
 # CLIProxyAPI invalid token cleanup
 ${CLEANUP_CRON_SCHEDULE} /app/cleanup_tokens.sh >> /tmp/logs/cleanup.log 2>&1
 EOF
 
 echo "[entrypoint] Cleanup schedule: ${CLEANUP_CRON_SCHEDULE}"
 
-# Start crond (busybox)
-crond -l 8 -L /tmp/logs/crond.log
+# Start crond (busybox) with custom crontab directory
+crond -c /tmp/crontabs -l 8 -L /tmp/logs/crond.log
 echo "[entrypoint] crond started"
 
 # Wait for the API to be ready, then run the initial cleanup in background.