Redis memory overcommit warning

[morganney]

Picking this up from #122

Additionally, check container startup messages and ensure proper configuration of containers so any significant warnings are removed. Specifically, the ones about redis...

• https://stackoverflow.com/questions/76830848/redis-warning-memory-overcommit-must-be-enabled
• Add a way to enable overcommit memory in docker-entrypoint redis/docker-library-redis#298

Here are the container startup messages related:

1:C 06 Jan 2024 03:38:39.248 # WARNING Memory overcommit must be enabled! Without it, a background save or replication may fail under low memory condition. Being disabled, it can also cause failures without low memory condition, see https://github.com/jemalloc/jemalloc/issues/1328. To fix this issue add 'vm.overcommit_memory = 1' to /etc/sysctl.conf and then reboot or run the command 'sysctl vm.overcommit_memory=1' for this to take effect.