Pass environment variables to OCI runtime

[mgjm]

Add a new option to CreateContainerConfig to pass environment variables to OCI runtime.

type CreateContainerConfig struct {
    ...

    // EnvVars are the environment variables passed to the create runtime call,
    // in the form "key=value"
    EnvVars []string
}

Nice to have:

func (c *CreateContainerConfig) AddEnvVar(key, value string) {
    c.EnvVars = append(c.EnvVars, fmt.Sprintf("%s=%s", key, value))
}

[mgjm]

Implemented in mgjm-fork/podman@a17e317 and mgjm-fork/conmon-rs@e91893a.

Should we add the helper function to add env vars?

Alternative encoding: Go prefers to use env vars strings with "key=value", rust uses maps or tuples to represent env vars. What should we use at the protocol level?

[mgjm]

Change them to actual Map

[mgjm]

• Create container with environment variables containers/conmon-rs#1499