neovim: Start Neotree in the config function

...so that our config is actually applied when we start

nvim/.config/nvim/init.vim

@@ -65,6 +65,3 @@ function _G.set_focus_keymaps()
 end
 EOF
 autocmd BufEnter * lua set_focus_keymaps()
-
-" Startup commands
-autocmd UIEnter * Neotree

nvim/.config/nvim/lua/plugins.lua

@@ -41,12 +41,15 @@ return require('packer').startup(function(use)
             "kyazdani42/nvim-web-devicons",
             "MunifTanjim/nui.nvim",
         },
-        config = function() require("neo-tree").setup({
-            window = {
-                position = "left",
-                width = 36,
-            },
-        }) end,
+        config = function()
+            require("neo-tree").setup({
+                window = {
+                    position = "left",
+                    width = 36,
+                },
+            })
+            require("neo-tree.sources.manager").show("filesystem")
+        end,
     }
 
     -- Tabs