I stumbled upon another problem – my linode VM started throwing OOM errors during GADM geopackage ingestion. Running Postgres, ogr2ogr and docker simultaneously turned out to be too much for cheapest 5$/month, 1GB RAM VM. I was’t expecting this problem since I already successfully ingested GADM into a instance that was running directly on my VM in the past. I spent entire day tweaking Postgres memory settings in postgresql.conf file but in the end the only solution that worked was to upgrade the machine to 2GB RAM.