set vim colorizer to be on by default

nvim/init.vim

@@ -73,6 +73,8 @@ let hostname=system('hostname -s | tr -d "\n"')
 let ipaddr=system('hostname -i | tr -d "\n"')
 let g:airline_section_x = 'IP:%{ipaddr} DNS:%{hostname}'
 
+:ColorizerToggle
+
 nnoremap <C-l> <C-w>w
 nnoremap <C-h> <C-w>h
 nnoremap <C-j> <C-w>j