Added retrying

Gemfile.lock

@@ -1,14 +1,25 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    activesupport (5.2.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    backports (3.11.3)
+    concurrent-ruby (1.0.5)
     domain_name (0.5.20180417)
       unf (>= 0.0.5, < 1.0.0)
     dotenv (2.5.0)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
+    i18n (1.1.0)
+      concurrent-ruby (~> 1.0)
     mime-types (3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2016.0521)
+    minitest (5.11.3)
+    multi_json (1.13.1)
     mustermann (1.0.2)
     netrc (0.11.0)
     rack (2.0.5)
@@ -26,9 +37,20 @@ GEM
       rack (~> 2.0)
       rack-protection (= 2.0.3)
       tilt (~> 2.0)
+    sinatra-contrib (2.0.3)
+      activesupport (>= 4.0.0)
+      backports (>= 2.8.2)
+      multi_json
+      mustermann (~> 1.0)
+      rack-protection (= 2.0.3)
+      sinatra (= 2.0.3)
+      tilt (>= 1.3, < 3)
     sinatra-router (0.2.4)
       sinatra (>= 1.4, < 3.0)
+    thread_safe (0.3.6)
     tilt (2.0.8)
+    tzinfo (1.2.5)
+      thread_safe (~> 0.1)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.5)
@@ -42,6 +64,7 @@ DEPENDENCIES
   rest-client (~> 2.0)
   retries (~> 0.0.5)
   sinatra (~> 2.0)
+  sinatra-contrib (~> 2.0)
   sinatra-router (~> 0.2.4)
 
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