Update deploy script with waiting for database server to start

entrypoint.sh

@@ -3,14 +3,14 @@
 # docker entrypoint script.
 
 # assign a default for the database_user
-# DB_USER=${DATABASE_USER:-postgres}
+DB_USER=${DATABASE_USER:-postgres}
 
-# # wait until Postgres is ready
-# while ! pg_isready -q -h $DATABASE_HOST -p 5432 -U $DB_USER
-# do
-#   echo "$(date) - waiting for database to start"
-#   sleep 2
-# done
+# wait until Postgres is ready
+while ! pg_isready -q -h $DATABASE_HOST -p 5432 -U $DB_USER
+do
+  echo "$(date) - waiting for database to start"
+  sleep 2
+done
 
 bin="/app/bin/diskuy"
 eval "$bin eval \"Diskuy.Release.migrate\""