updated readme and automatically download appimage

README.md

@@ -12,11 +12,15 @@ nix build
 
 ```txt
 nix develop
-nix run .#dev
 ```
 
-The `nix run .#dev` command will download the AppImage used for building.
-It can then be inspected locally with tools like `file` and `appimage-run`, which are offered by the `nix develop` command.
+This will put you in a shell with `appimage-run` and other useful utilities.
+It will also download the AppImage that is currently being packaged.
+To manually download the AppImage do:
+
+```txt
+nix run .#dev
+```
 
 ### Resources
 

flake.nix

@@ -44,7 +44,7 @@
     apps.${system} = {
       dev = {
         program = "${pkgs.writeShellScript "download-appimage" ''
-          ${pkgs.curl}/bin/curl ${src.url} -Lo ${name}.AppImage
+          ${pkgs.curl}/bin/curl ${src.url} -C - -Lo ${name}.AppImage
         ''}";
         type = "app";
       };
@@ -56,6 +56,10 @@
           appimage-run
           file
         ];
+
+        shellHook = ''
+          ${self.apps.${system}.dev.program}
+        '';
       };
     };
   };