Improve bin/attach

[coolgw]

Improve bin/attach

1. The socker name using "-" instead of "_" now, for example: kitsu-tools-web-1

2. Some docker has no bash, so we can use sh instead

./bin/attach web OCI runtime exec failed: exec failed: unable to start container process: exec: "/bin/bash": stat /bin/bash: no such file or directory: unknown

cc @hummingbird-me/owners