### What changes were proposed in this pull request?
Use `tmp` subfolder for svc staging dir.
### Why are the changes needed?
Refer:
81c3d91f75/build/release/release.sh (L67)
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Local.
Closes#3278 from turboFei/release_guide_follow.
Authored-by: Fei Wang <fwang12@ebay.com>
Signed-off-by: Wang, Fei <fwang12@ebay.com>
### What changes were proposed in this pull request?
Add release guide and fix several issues during 0.6.0 release.
### Why are the changes needed?
Add docs.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Tested locally.
Closes#3271 from turboFei/release_guide.
Authored-by: Fei Wang <fwang12@ebay.com>
Signed-off-by: Fei Wang <fwang12@ebay.com>