fix: use ~/dotfiles, update docs, and disable Docker

Co-authored-by: aider (openrouter/openai/gpt-5.2) <aider@aider.chat>

hosts/sam-4screen-desktop/configuration.nix

@@ -31,7 +31,7 @@
   networking.networkmanager.enable = true;
 
   # Static IP policy:
-  # - You confirmed the static IP must be on Wi-Fi SSID "Aussie Broadband 8729"
+  # - Static IP must be on Wi-Fi SSID "Aussie Broadband 8729"
   # - Do NOT store Wi-Fi secrets (PSK) in git-tracked Nix files
   #
   # Approach:
@@ -105,7 +105,7 @@
   users.users.sam = {
     isNormalUser = true;
     description = "Sam";
-    extraGroups = [ "wheel" "networkmanager" "docker" "video" "render" ];
+    extraGroups = [ "wheel" "networkmanager" "video" "render" ];
     shell = pkgs.zsh;
   };
 
@@ -172,9 +172,9 @@
   zramSwap.enable = true;
 
   # ---
-  # Docker
+  # Docker (DEFER for now)
   # ---
-  virtualisation.docker.enable = true;
+  virtualisation.docker.enable = false;
 
   # ---
   # Mounts