Add configuration file support

[dorser]

Summary

All micromize configuration is via CLI flags (--enforce, --verbose). Production deployments need richer configuration options.

What's Needed

Design and implement configuration file support:

Config File Format

YAML config file (e.g., /etc/micromize/config.yaml):

enforce: true
verbose: false
logLevel: info

gadgets:
  fs-restrict:
    enabled: true
    params:
      # gadget-specific params
  cap-restrict:
    enabled: true
  ptrace-restrict:
    enabled: false

exclusions:
  images:
    - "monitoring-agent:*"
    - "log-collector:*"
  namespaces:
    - kube-system

Implementation

• Use Viper (already have Cobra) for config file loading
• Support config file path via --config flag
• CLI flags should override config file values
• Consider ConfigMap mounting in Kubernetes

Files

• cmd/micromize/root.go
• charts/micromize/templates/daemonset.yaml