how can I map 'esc' key to 'jk' or 'jj' in spacevim? What is the configuration file for spacevim. Is there any legendary spacevim config you can share?
As @jubnzv mentioned, you need to find a way to add inoremap jj <Esc> in your config. In spacevim, you can do it with the Bootstrap functions.
SpaceVim provides two kinds of bootstrap functions for custom configurations and key bindings, namely bootstrap_before and bootstrap_after.
First, enable the bootstrap in your config, the default path is ~/.SpaceVim.d/init.toml
[options]
bootstrap_before = 'myspacevim#before'
bootstrap_after = 'myspacevim#after'
Next, create file ~/.SpaceVim.d/autoload/myspacevim.vim with the following contents
function! myspacevim#before() abort
endfunction
function! myspacevim#after() abort
inoremap jj <Esc>
endfunction
More detail in the official document here: https://spacevim.org/documentation/#concepts