Dokku Postgres Upgrade 11 to latest w/ PostGIS

okhlopkov.sh

dokku postgres:export DB | gzip -9 > DB.sql.gz


docker pull postgis/postgis:latest
export POSTGRES_IMAGE="postgis/postgis" 
export POSTGRES_IMAGE_VERSION="latest"

dokku postgres:create DB
gunzip DB.sql.gz | dokku postgres:import DB

Transfer postgres backup from server to a server using your machine as a intermediate device (you also would have a local copy of a db).

scp root@host:~/DB.sql.gz .
scp DB.sql.gz root@new_host:~/.