Config cleanup (#582)

* Clean up Gemfile and add github-pages gem

* Clean up default comments in _config.yml

Gemfile

@@ -1,25 +1,11 @@
 source "https://rubygems.org"
 
-# Hello! This is where you manage which Jekyll version is used to run.
-# When you want to use a different version, change it below, save the
-# file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
-#
-#     bundle exec jekyll serve
-#
-# This will help ensure the proper Jekyll version is running.
-# Happy Jekylling!
-gem "jekyll", "~> 3.8.4"
+# Install github-pages gem (https://jekyllrb.com/docs/github-pages/)
+gem "github-pages", group: :jekyll_plugins
 
-# This is the default theme for new Jekyll sites. You may change this to anything you like.
-# gem "minima", "~> 2.0"
-
-# If you want to use GitHub Pages, remove the "gem "jekyll"" above and
-# uncomment the line below. To upgrade, run `bundle update github-pages`.
-# gem "github-pages", group: :jekyll_plugins
-
-# If you have any plugins, put them here!
+# Plugins
 group :jekyll_plugins do
-  # gem "jekyll-feed", "~> 0.6"
+  # example: gem "jekyll-feed", "~> 0.6"
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem

_config.yml

@@ -1,40 +1,6 @@
-# Welcome to Jekyll!
-#
-# This config file is meant for settings that affect your whole blog, values
-# which you are expected to set up once and rarely edit after that. If you find
-# yourself editing this file very often, consider using Jekyll's data files
-# feature for the data you need to update frequently.
-#
-# For technical reasons, this file is *NOT* reloaded automatically when you use
-# 'bundle exec jekyll serve'. If you change this file, please restart the server process.
-
-# Site settings
-# These are used to personalize your new site. If you look in the HTML files,
-# you will see them accessed via {{ site.title }}, {{ site.email }}, and so on.
-# You can create any custom variable you would like, and they will be accessible
-# in the templates via {{ site.myvariable }}.
 title: Privacy Tools - Encryption Against Global Mass Surveillance
-description: >- # this means to ignore newlines until "baseurl:"
-  You are being watched! Knowledge, encryption and privacy tools to protect you against global mass surveillance.
-baseurl: "" # the subpath of your site, e.g. /blog
-url: "" # the base hostname & protocol for your site, e.g. http://example.com
+description: You are being watched! Knowledge, encryption and privacy tools to protect you against global mass surveillance.
+url: "https://privacytools.io"
 sass:
   style: compressed
 
-# Build settings
-# markdown: kramdown
-# theme: minima
-# plugins:
-#   - jekyll-feed
-
-# Exclude from processing.
-# The following items will not be processed, by default. Create a custom list
-# to override the default setting.
-# exclude:
-#   - Gemfile
-#   - Gemfile.lock
-#   - node_modules
-#   - vendor/bundle/
-#   - vendor/cache/
-#   - vendor/gems/
-#   - vendor/ruby/