Add elixirls lspconfig

lua/config/lspconfig.lua

@@ -20,6 +20,19 @@ end
 
 require 'lspconfig'.rnix.setup {}
 
+-- elixirls
+if not configs.elixirls then
+    configs.elixirls = {
+        default_config = {
+            cmd = { '/usr/bin/elixir-ls' },
+            filetypes = { 'elixir' },
+            root_dir = function(fname)
+                return nvim_lsp.util.root_pattern("mix.exs", ".git")(fname) or vim.loop.os_homedir()
+            end,
+        }
+    }
+end
+
 -- keybindings
 
 local on_attach = function(client, bufrn)
@@ -62,6 +75,8 @@ local on_attach = function(client, bufrn)
     buf_set_keymap('n', '<space>f', '<cmd>lua vim.lsp.buf.format()<CR>', opts, "LSP", "formatting", "Format")
 end
 
+
+
 -- Launch language servers
 local servers = {
     'harepls',