clean up and install angular cli

flake.nix

@@ -49,6 +49,10 @@
                   upquote
                 ]))
           ];
+
+          angularPackages = with pkgs; [
+            nodePackages."@angular/cli"
+          ];
         in {
           # Per-system attributes can be defined here. The self' and inputs'
           # module parameters provide easy access to attributes of the same
@@ -101,7 +105,8 @@
                   jetty
                   maven
                 ]
-                ++ latexPackages;
+                ++ latexPackages
+                ++ angularPackages;
 
               shellHook =
                 # bash
@@ -128,7 +133,7 @@
                   jetty --add-modules=http,ee11-cdi,ee11-ext,ee11-deploy,ee11-environment,ee11-annotations,ee11-glassfish-jstl,ee11-jndi,ee11-jsp,ee11-jstl,ee11-plus,ee11-security,ee11-servlet,ee11-servlets,ee11-webapp,ee11-websocket-jakarta,ee11-websocket-jetty,ee11-websocket-jetty-client-webapp
 
                   echo "Usage Example:"
-                  echo "jetty --add-modules=... # add modules"
+                  echo "mvn clean package # build demo.war"
                   echo "jetty # run webserver"
                 '';
             };