feat: add Dockerfile for easier project setup

lua/lazy_setup.lua

@@ -1,21 +1,19 @@
 require("lazy").setup({
   {
     "AstroNvim/AstroNvim",
-    version = "^5", -- Remove version tracking to elect for nightly AstroNvim
+    version = "^4", -- Ensure we use AstroNvim v4+
     import = "astronvim.plugins",
-    opts = { -- AstroNvim options must be set here with the `import` key
-      mapleader = " ", -- This ensures the leader key must be configured before Lazy is set up
-      maplocalleader = ",", -- This ensures the localleader key must be configured before Lazy is set up
-      icons_enabled = true, -- Set to false to disable icons (if no Nerd Font is available)
-      pin_plugins = nil, -- Default will pin plugins when tracking `version` of AstroNvim, set to true/false to override
-      update_notifications = false, -- Enable/disable notification about running `:Lazy update` twice to update pinned plugins
+    opts = {
+      -- Leaders are set early in init.lua to ensure consistency
+      icons_enabled = (vim.g.have_nerd_font ~= false),
+      pin_plugins = nil,
+      update_notifications = false,
     },
   },
   { import = "community" },
   { import = "plugins" },
 } --[[@as LazySpec]], {
-  -- Configure any other `lazy.nvim` configuration options here
-  install = { colorscheme = { "astrotheme", "habamax" } },
+  install = { colorscheme = { "astrotheme" } },
   ui = { backdrop = 100 },
   performance = {
     rtp = {