Add parser gemfile

parsers/package-tracking/Dockerfile

@@ -1,14 +1,14 @@
 FROM ruby:2.5.0
 
-# TODO: Move to Gemfile
-RUN gem install tracking_number -v 1.0.3
-RUN gem install sinatra -v 2.0
-
-EXPOSE 3000
-
 RUN mkdir -p /src
 WORKDIR /src
 
+EXPOSE 3000
+
+COPY Gemfile /src/
+COPY Gemfile.lock /src/
+RUN bundle install
+
 COPY main.rb  /src/
 
 CMD ruby main.rb

parsers/package-tracking/Gemfile

@@ -0,0 +1,5 @@
+source 'https://rubygems.org'
+ruby '2.5'
+
+gem 'tracking_number', '1.0.3'
+gem 'sinatra', '2.0'

parsers/package-tracking/Gemfile.lock

@@ -0,0 +1,40 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    activesupport (5.1.4)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (~> 0.7)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    concurrent-ruby (1.0.5)
+    i18n (0.9.4)
+      concurrent-ruby (~> 1.0)
+    minitest (5.11.3)
+    mustermann (1.0.1)
+    rack (2.0.4)
+    rack-protection (2.0.0)
+      rack
+    sinatra (2.0.0)
+      mustermann (~> 1.0)
+      rack (~> 2.0)
+      rack-protection (= 2.0.0)
+      tilt (~> 2.0)
+    thread_safe (0.3.6)
+    tilt (2.0.8)
+    tracking_number (1.0.3)
+      activesupport (>= 4.2.5)
+    tzinfo (1.2.5)
+      thread_safe (~> 0.1)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  sinatra (= 2.0)
+  tracking_number (= 1.0.3)
+
+RUBY VERSION
+   ruby 2.5.0p0
+
+BUNDLED WITH
+   1.16.1