Rakefile: explicitly only install dev dependencies for node, add comments, and...

Rakefile: explicitly only install dev dependencies for node, add comments, and create gem file with explicit filename "hci-theme.gem"

Rakefile

@@ -8,9 +8,13 @@ require 'rake'
 task :default => [:build]
 
 task :build do
-  print 'Building HCI-Theme'
-  system 'npm install'
+  print 'Packing HCI-Theme'
+
+  # Webpack JS dependencies (partially extracted from node packages)
+  system 'npm install --dev-only'
   system 'npx webpack -p --config webpack.config.js --mode=production'
+
+  # Add (S)CSS and other resources
   FileUtils.mkdir_p('_sass')
   FileUtils.copy_entry 'node_modules/slick-carousel', '_sass/slick-carousel'
   FileUtils.mkdir_p('assets/css/fonts')
@@ -35,5 +39,6 @@ CLOBBER << "_sass/slick-carousel"
 CLEAN << "node_modules"
 
 task :gem => [:build] do
-    system "gem build hci-theme.gemspec"
+    print 'Building HCI-Theme gem'
+    system "gem build hci-theme.gemspec -o hci-theme.gem"
 end