### What problem does this PR solve?
Fix docker file bugs
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
- [x] Documentation Update
---------
Co-authored-by: writinwaters <93570324+writinwaters@users.noreply.github.com>
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
Add doc for dev image
### Type of change
- [x] Documentation Update
---------
Co-authored-by: writinwaters <93570324+writinwaters@users.noreply.github.com>
### What problem does this PR solve?
Build multi-arch docker image `infiniflow/ragflow:poetry` on
`linux/amd64` and `linux/arm64`.
### Type of change
- [x] Refactoring
Kevin Hu
Zhichang Yu