How to add swap to docker?

Guys hi,

I am using Ubuntu Docker 17.12.0ce on 16.04 and have php app running. It has 2 containers: prj_apache_1 and prj1_mysql_1

Problem is that mysql container is frequently crushing. Solution is to add swap space. But most of explanation are for “regular” server not dockerized.

I do not have root@myserver:~#,

i have root@docker-s-1vcpu-1gb-nyc3-01:~#, also i can “get in” apache using docker exec -ti prj_apache_1 bash and mysql docker exec -ti prj_mysql_1 bash

so my question inside which containers do i run this commands: https://www.digitalocean.com/community/questions/mysql-server-stops-very-frequently?comment=42488 ?