Allow setting shared memory size

[pbillaut]

Allow users to set the shared memory size (--shm-size=N) when creating a runnable container image.

An example for a container where this is useful would be solace/solace-pubsub-standard, which requires at least 1GB of shared memory to be able to run (see Solace Docs > Resource Requirements for Container Images). By default, the docker run command sets the shared memory size to 64MB (see option --shm-size).

Analog feature in testcontainers for Java: testcontainers/testcontainers-java#952.

[thomaseizinger]

Sounds reasonable to me, thank you for creating a PR!