fail to init submodule

[okki-dev1]

Describe the bug
git submodule init not work

To Reproduce

1. clone the repo
2. run git submodule init
3. nothings happens

Expected behavior
All the submodule should be initialized well

Fix advice
According to this answer, all the folder for submodule should be committed to the repo

Workaround
For whom met this issue, you can manually add submodule by yourself

git submodule add https://github.com/crawlab-team/crawlab-core backend/core
git submodule add https://github.com/crawlab-team/crawlab-db backend/db
git submodule add https://github.com/crawlab-team/crawlab-fs backend/fs
git submodule add https://github.com/crawlab-team/crawlab-vcs backend/vcs
git submodule add https://github.com/crawlab-team/crawlab-log backend/log

[tikazyq]

This is interesting but submodule is not recommended. If you want to contribute to the core code, you can git clone each repo to your local machine and try to link them in the go.mod file.