diff --git a/.gitignore b/.gitignore
index c0524f2..a077bbc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -86,3 +86,62 @@ tags
 
 
 # End of https://www.gitignore.io/api/vim,code,macos,jekyll,sublimetext
+
+
+
+# Created by https://www.gitignore.io/api/ruby
+
+### Ruby ###
+*.gem
+*.rbc
+/.config
+/coverage/
+/InstalledFiles
+/pkg/
+/spec/reports/
+/spec/examples.txt
+/test/tmp/
+/test/version_tmp/
+/tmp/
+
+# Used by dotenv library to load environment variables.
+# .env
+
+## Specific to RubyMotion:
+.dat*
+.repl_history
+build/
+*.bridgesupport
+build-iPhoneOS/
+build-iPhoneSimulator/
+
+## Specific to RubyMotion (use of CocoaPods):
+#
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
+#
+# vendor/Pods/
+
+## Documentation cache and generated files:
+/.yardoc/
+/_yardoc/
+/doc/
+/rdoc/
+
+## Environment normalization:
+/.bundle/
+/vendor/bundle
+/lib/bundler/man/
+
+# for a library or gem, you might want to ignore these files since the code is
+# intended to run in multiple environments; otherwise, check them in:
+Gemfile.lock
+# .ruby-version
+# .ruby-gemset
+
+# unless supporting rvm < 1.11.0 or doing something fancy, ignore this:
+.rvmrc
+
+
+# End of https://www.gitignore.io/api/ruby
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..e4cf3f5
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,16 @@
+language: ruby
+rvm:
+- 2.3.3
+
+before_script:
+ - chmod +x ./script/cibuild # or do this locally and commit
+
+# Assume bundler is being used, therefore
+# the `install` step will run `bundle install` by default.
+script: ./script/cibuild
+
+env:
+  global:
+  - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer
+
+sudo: false # route your build to the container-based infrastructure for a faster build
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
index c99d6dd..d8777ee 100755
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,4 @@
 source "https://rubygems.org"
 
 gem "jekyll"
+gem "html-proofer"
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
deleted file mode 100644
index 9abbe93..0000000
--- a/Gemfile.lock
+++ /dev/null
@@ -1,63 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
-    colorator (1.1.0)
-    concurrent-ruby (1.0.5)
-    em-websocket (0.5.1)
-      eventmachine (>= 0.12.9)
-      http_parser.rb (~> 0.6.0)
-    eventmachine (1.2.6)
-    ffi (1.9.23)
-    forwardable-extended (2.6.0)
-    http_parser.rb (0.6.0)
-    i18n (0.9.5)
-      concurrent-ruby (~> 1.0)
-    jekyll (3.8.0)
-      addressable (~> 2.4)
-      colorator (~> 1.0)
-      em-websocket (~> 0.5)
-      i18n (~> 0.7)
-      jekyll-sass-converter (~> 1.0)
-      jekyll-watch (~> 2.0)
-      kramdown (~> 1.14)
-      liquid (~> 4.0)
-      mercenary (~> 0.3.3)
-      pathutil (~> 0.9)
-      rouge (>= 1.7, < 4)
-      safe_yaml (~> 1.0)
-    jekyll-sass-converter (1.5.2)
-      sass (~> 3.4)
-    jekyll-watch (2.0.0)
-      listen (~> 3.0)
-    kramdown (1.16.2)
-    liquid (4.0.0)
-    listen (3.1.5)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-      ruby_dep (~> 1.2)
-    mercenary (0.3.6)
-    pathutil (0.16.1)
-      forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
-    rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
-    rouge (3.1.1)
-    ruby_dep (1.5.0)
-    safe_yaml (1.0.4)
-    sass (3.5.6)
-      sass-listen (~> 4.0.0)
-    sass-listen (4.0.0)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  jekyll
-
-BUNDLED WITH
-   1.16.1
diff --git a/README.md b/README.md
index 146b7ec..7a9577f 100755
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
 jef-sachsen.de
 ==============
 
+master: ![Travis CI Master](https://travis-ci.org/jef-sachsen/jef-sachsen.de.svg?branch=master), develop: ![Travis CI Develop](https://travis-ci.org/jef-sachsen/jef-sachsen.de.svg?branch=develop)
+
 Thanks at [@jeromelachaud](https://jeromelachaud.github.io/freelancer-theme) for providing the basis of this website.
diff --git a/_config.yml b/_config.yml
index 5fcd482..8412a98 100755
--- a/_config.yml
+++ b/_config.yml
@@ -53,3 +53,4 @@ address:
 # Build settings
 markdown: kramdown
 permalink: pretty
+exclude: [vendor]
diff --git a/script/cibuild b/script/cibuild
new file mode 100644
index 0000000..7b053a5
--- /dev/null
+++ b/script/cibuild
@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+set -e # halt script on error
+
+bundle exec jekyll build
+#bundle exec htmlproofer ./_site
\ No newline at end of file