Remove the Gemfile.lock, because it is created when the rails server is...

Remove the Gemfile.lock, because it is created when the rails server is started. And added in the .gitignore the line Gemfile.lock to ignore this file

.gitignore

@@ -16,4 +16,5 @@
 /log
 /db/schema.rb
 /db/development.sqlite3
-/db/test.sqlite3
\ No newline at end of file
+/db/test.sqlite3
+/Gemfile.lock

Gemfile.lock

-GEM
-  remote: https://rubygems.org/
-  specs:
-    actionmailer (4.2.0)
-      actionpack (= 4.2.0)
-      actionview (= 4.2.0)
-      activejob (= 4.2.0)
-      mail (~> 2.5, >= 2.5.4)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.0)
-      actionview (= 4.2.0)
-      activesupport (= 4.2.0)
-      rack (~> 1.6.0)
-      rack-test (~> 0.6.2)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.1)
-    actionview (4.2.0)
-      activesupport (= 4.2.0)
-      builder (~> 3.1)
-      erubis (~> 2.7.0)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-      rails-html-sanitizer (~> 1.0, >= 1.0.1)
-    activejob (4.2.0)
-      activesupport (= 4.2.0)
-      globalid (>= 0.3.0)
-    activemodel (4.2.0)
-      activesupport (= 4.2.0)
-      builder (~> 3.1)
-    activerecord (4.2.0)
-      activemodel (= 4.2.0)
-      activesupport (= 4.2.0)
-      arel (~> 6.0)
-    activesupport (4.2.0)
-      i18n (~> 0.7)
-      json (~> 1.7, >= 1.7.7)
-      minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
-      tzinfo (~> 1.1)
-    arel (6.0.2)
-    autoprefixer-rails (5.1.11)
-      execjs
-      json
-    bcrypt (3.1.10)
-    binding_of_caller (0.7.2)
-      debug_inspector (>= 0.0.1)
-    bootstrap-sass (3.3.4.1)
-      autoprefixer-rails (>= 5.0.0.1)
-      sass (>= 3.2.19)
-    builder (3.2.2)
-    byebug (5.0.0)
-      columnize (= 0.9.0)
-    coffee-rails (4.1.0)
-      coffee-script (>= 2.2.0)
-      railties (>= 4.0.0, < 5.0)
-    coffee-script (2.4.1)
-      coffee-script-source
-      execjs
-    coffee-script-source (1.9.1.1)
-    columnize (0.9.0)
-    debug_inspector (0.0.2)
-    devise (3.5.1)
-      bcrypt (~> 3.0)
-      orm_adapter (~> 0.1)
-      railties (>= 3.2.6, < 5)
-      responders
-      thread_safe (~> 0.1)
-      warden (~> 1.2.3)
-    erubis (2.7.0)
-    execjs (2.5.2)
-    globalid (0.3.5)
-      activesupport (>= 4.1.0)
-    i18n (0.7.0)
-    jbuilder (2.3.1)
-      activesupport (>= 3.0.0, < 5)
-      multi_json (~> 1.2)
-    jquery-rails (4.0.4)
-      rails-dom-testing (~> 1.0)
-      railties (>= 4.2.0)
-      thor (>= 0.14, < 2.0)
-    json (1.8.3)
-    loofah (2.0.2)
-      nokogiri (>= 1.5.9)
-    mail (2.6.3)
-      mime-types (>= 1.16, < 3)
-    mime-types (2.6.1)
-    mini_portile (0.6.2)
-    minitest (5.7.0)
-    multi_json (1.11.2)
-    nokogiri (1.6.6.2)
-      mini_portile (~> 0.6.0)
-    orm_adapter (0.5.0)
-    pg (0.18.2)
-    rack (1.6.4)
-    rack-test (0.6.3)
-      rack (>= 1.0)
-    rails (4.2.0)
-      actionmailer (= 4.2.0)
-      actionpack (= 4.2.0)
-      actionview (= 4.2.0)
-      activejob (= 4.2.0)
-      activemodel (= 4.2.0)
-      activerecord (= 4.2.0)
-      activesupport (= 4.2.0)
-      bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.0)
-      sprockets-rails
-    rails-deprecated_sanitizer (1.0.3)
-      activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.6)
-      activesupport (>= 4.2.0.beta, < 5.0)
-      nokogiri (~> 1.6.0)
-      rails-deprecated_sanitizer (>= 1.0.1)
-    rails-html-sanitizer (1.0.2)
-      loofah (~> 2.0)
-    railties (4.2.0)
-      actionpack (= 4.2.0)
-      activesupport (= 4.2.0)
-      rake (>= 0.8.7)
-      thor (>= 0.18.1, < 2.0)
-    rake (10.4.2)
-    rdoc (4.2.0)
-    responders (2.1.0)
-      railties (>= 4.2.0, < 5)
-    sass (3.4.16)
-    sass-rails (5.0.3)
-      railties (>= 4.0.0, < 5.0)
-      sass (~> 3.1)
-      sprockets (>= 2.8, < 4.0)
-      sprockets-rails (>= 2.0, < 4.0)
-      tilt (~> 1.1)
-    sdoc (0.4.1)
-      json (~> 1.7, >= 1.7.7)
-      rdoc (~> 4.0)
-    spring (1.3.6)
-    sprockets (3.2.0)
-      rack (~> 1.0)
-    sprockets-rails (2.3.2)
-      actionpack (>= 3.0)
-      activesupport (>= 3.0)
-      sprockets (>= 2.8, < 4.0)
-    sqlite3 (1.3.10)
-    thor (0.19.1)
-    thread_safe (0.3.5)
-    tilt (1.4.1)
-    turbolinks (2.5.3)
-      coffee-rails
-    tzinfo (1.2.2)
-      thread_safe (~> 0.1)
-    uglifier (2.7.1)
-      execjs (>= 0.3.0)
-      json (>= 1.8.0)
-    warden (1.2.3)
-      rack (>= 1.0)
-    web-console (2.2.1)
-      activemodel (>= 4.0)
-      binding_of_caller (>= 0.7.2)
-      railties (>= 4.0)
-      sprockets-rails (>= 2.0, < 4.0)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  bootstrap-sass
-  byebug
-  coffee-rails (~> 4.1.0)
-  devise
-  jbuilder (~> 2.0)
-  jquery-rails
-  pg
-  rails (= 4.2.0)
-  sass-rails (~> 5.0)
-  sdoc (~> 0.4.0)
-  spring
-  sqlite3
-  turbolinks
-  uglifier (>= 1.3.0)
-  web-console (~> 2.0)