add resource limitation to containers

CPU, memory and Ephemeral Storage limits are not set for various container.

Resource limits are recommended to avoid resource DDOS.

Set resources.limits.cpu, resources.limits.memory and resources.limits.ephemeral-storage

Need also to document how to detect that a limit is reached on site (grafana/prometheus?), how to remediate the problem by increasing the limits, and how to provide feedback to the product team for increasing the default values in future releases