wait for db container to be available before starting server

docker-compose-wait-for-db.sh

#!/bin/bash THIS WORKED

bash -c 'while ! </dev/tcp/db/5432; do sleep 1; done; nodal db:bootstrap && nodal s;'

#THIS WORKS ONLY IF NETSTST INSTALLED
while ! nc -w 1 -z db 5432; do sleep 0.1; done

#ANOTHER WAY
until nc -z postgres 5432; do
   echo "$(date) - waiting for postgres..."
   sleep 1
done

#THIS WORKS ONLY IF NETSTST INSTALLED

I believe you meant netcat.