Docker Entrypoint waits Mysql Started before running App

docker-entrypoint.sh

#!/bin/bash

set -e

host="$1"
password="$MYSQL_ROOT_PASSWORD"

until mysql -h "$host" -uroot -p$password; do
  >&2 echo "MYSQL is unavailable - sleeping"
  sleep 1
done

>&2 echo "MYSQL is up - executing command"

# start service
>&2 echo "Start Service ...!"
cd /build && python3 run.py

entrypoint.sh

#!/bin/bash

set -e

host="$1"
password="$MYSQL_PASS"

until mysql -h "$host" -uadmin -p$password; do
  >&2 echo "MYSQL is unavailable - sleeping"
  sleep 1
done

while 1
do
    SQL_IS_RUNNING=$(mysql -h db_slave -upolsat -p$password -e "SHOW SLAVE STATUS\G" | grep "Slave_SQL_Running" | awk '{ print $2 }')
    if [ "$SQL_IS_RUNNING" == "Yes" ]
    then
        break
    fi
    >&2 echo "MYSQL SLave is unavailable - sleeping"
    sleep 1
done

>&2 echo "MYSQL is up - executing command"

# run cron service
>&2 echo "Start Cron ...!"
cron

# run upgrade database
>&2 echo "Upgrade/Downgrade Db Schema...!"
cd /build && python3 manage.py db upgrade

# start service
>&2 echo "Start Service ...!"
cd /build && python3 run.py
#uwsgi --ini /build/wsgi.ini --uid root --gid www-data