Use golang gofmt's style.

.vim/vimrc

@@ -104,6 +104,7 @@ au BufNewFile,BufRead GNUmakefile set noexpandtab
 au BufNewFile,BufRead Makefile set noexpandtab
 au BufReadPost * if line("'\"") > 0|if line("'\"") <= line("$")|exe("norm '\"")|else|exe "norm $"|endif|endif
 au FileType dart,html,javascript,javascriptreact,json,ruby,typescript,yaml set shiftwidth=2
+au FileType go set shiftwidth=4 tabstop=4
 autocmd BufEnter * silent! lcd %:p:h
 autocmd BufReadPost COMMIT_EDITMSG exe "normal! gg"
 map <C-n> :NERDTreeToggle<CR>