* feat: cache dockerfile images through warmer
* Fix logical error in conditional statement
* Addressed review feedback
1. Updated help text for the --build-arg flag to indicate it should be used with the dockerfile flag.
2. Updated the documentation to include the optional --build-arg flag.
3. Added unit tests for `ParseDockerfile`, covering scenarios for missing Dockerfile, invalid Dockerfile, single stage Dockerfile, multi-stage Dockerfile and Args Dockerfile
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Co-authored-by: 连奔驰 <benchi.lian@thoughtworks.com>
which means we can now:
- set up one or more mirrors
- set up registries certificates
- skip TLS verify
- use plain HTTP
using the same set of flags that are defined for the executor
