Shell script to reset a postgres DB running in a docker container with no exposed network port

postgres_container_reset.sh

#!/bin/bash
# To create the seed run 
#    docker exec -t <dockerid> pg_dump -U postgres <dbname> -fc > seed.dump

set -euo pipefail
IFS=$'\n\t'

if [ $# -eq 0 ]; then
  echo "dockerId must be provided"
  echo "$0 <dockerId> [filename.dump:-seed.dump] [db_name:-DB_NAME:–postgres]"
  exit -1
fi

DOCKER_ID="${1}"
SEED="${2:-seed.dump}"
DB_NAME="${3:-${DB_NAME:=postgres}}"

echo "#######################"
echo "# ${0} "
echo "# DOCKER_ID = ${DOCKER_ID} "
echo "#      SEED = ${SEED} "
echo "#   DB_NAME = ${DB_NAME} "
echo "#######################"
docker exec $DOCKER_ID dropdb -U postgres "${DB_NAME}" || true
docker exec $DOCKER_ID createdb -U postgres "${DB_NAME}"
docker exec -i $DOCKER_ID pg_restore -U postgres -d "${DB_NAME}" < "$SEED"
echo "# ${0} done"
echo "#######################"