Rakefile: disable optional dependencies for node, adds comments

Rakefile

@@ -8,13 +8,16 @@ require 'rake'
 task :default => [:build]
 
 task :build do
-  print 'Packing HCI-Theme'
 
   # Webpack JS dependencies (partially extracted from node packages)
-  system 'npm install --dev-only'
+  puts '[Web-Packing HCI-Theme]' 
+
+  system 'npm install --no-optional' 
   system 'npx webpack -p --config webpack.config.js --mode=production'
 
   # Add (S)CSS and other resources
+  puts '[Gathering assets from Node]'
+
   FileUtils.mkdir_p('_sass')
   FileUtils.copy_entry 'node_modules/slick-carousel', '_sass/slick-carousel'
   FileUtils.mkdir_p('assets/css/fonts')
@@ -39,6 +42,6 @@ CLOBBER << "_sass/slick-carousel"
 CLEAN << "node_modules"
 
 task :gem => [:build] do
-    print 'Building HCI-Theme gem'
+    puts '[Building HCI-Theme gem]'
     system "gem build hci-theme.gemspec -o hci-theme.gem"
 end