replace elm-go with nix elm-live package

flake.nix

@@ -114,18 +114,8 @@
           mkShell {
             inputsFrom = [ example-spa-elm-app ];
             buildInputs = [
-              nodejs_22
-             ];
-
-             shellHook = ''
-               if [ ! -d "$PWD/frontend/node_modules/elm-go" ]; then
-                 echo "Installing elm-go..."
-                 cd "$PWD/frontend"
-                 ${nodejs_22}/bin/npm install elm-go
-                 cd ..
-               fi
-               export PATH="$PWD/frontend/node_modules/.bin:$PATH"
-             '';
+              elmPackages.elm-live
+            ];
           };
       }
     );

frontend/Makefile

@@ -21,7 +21,7 @@ endif
 
 serve:
 ifeq ($(DEBUG),1)
-	elm-go src/Main.elm --port=8000 --dir=../public --start-page=index.html -- --output=../public/elm.min.js
+	elm-live src/Main.elm --port=8000 --dir=../public --start-page=index.html -- --output=../public/elm.min.js
 else ifeq ($(RELEASE),1)
 	$(error Cannot use serve target with RELEASE=1)
 endif