Compress JS and CSS files for production

Gemfile

@@ -48,6 +48,7 @@ gem 'slim-rails'
 gem 'sorcery' # Causes a deprecation warning in Rails 6.0+, see: https://github.com/Sorcery/sorcery/pull/255
 gem 'sprockets-rails'
 gem 'telegraf'
+gem 'terser'
 gem 'tubesock'
 gem 'turbolinks'
 gem 'whenever', require: false

Gemfile.lock

@@ -151,6 +151,7 @@ GEM
     erubi (1.11.0)
     eventmachine (1.2.7)
     excon (0.94.0)
+    execjs (2.8.1)
     factory_bot (6.2.1)
       activesupport (>= 5.0.0)
     factory_bot_rails (6.2.0)
@@ -488,6 +489,8 @@ GEM
     telegraf (2.1.1)
       influxdb
     temple (0.8.2)
+    terser (1.1.12)
+      execjs (>= 0.3.0, < 3)
     thor (1.2.1)
     tilt (2.0.11)
     timeout (0.3.0)
@@ -609,6 +612,7 @@ DEPENDENCIES
   sorcery
   sprockets-rails
   telegraf
+  terser
   tubesock
   turbolinks
   web-console

config/environments/production.rb

@@ -28,7 +28,10 @@ Rails.application.configure do
   config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
 
   # Compress CSS using a preprocessor.
-  # config.assets.css_compressor = :sass
+  config.assets.css_compressor = :sass
+
+  # Compress JavaScript using a preprocessor.
+  config.assets.js_compressor = :terser
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.
   config.assets.compile = false