chore: add jekyll gem

Gemfile

@@ -7,3 +7,5 @@ ruby '3.3.1'
 gem 'sinatra'
 
 gem "rackup", "~> 2.1"
+
+gem "jekyll", "~> 4.3"

Gemfile.lock

@@ -1,9 +1,58 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    addressable (2.8.6)
+      public_suffix (>= 2.0.2, < 6.0)
     base64 (0.2.0)
+    colorator (1.1.0)
+    concurrent-ruby (1.2.3)
+    em-websocket (0.5.3)
+      eventmachine (>= 0.12.9)
+      http_parser.rb (~> 0)
+    eventmachine (1.2.7)
+    ffi (1.16.3)
+    forwardable-extended (2.6.0)
+    google-protobuf (4.26.1)
+      rake (>= 13)
+    google-protobuf (4.26.1-x86_64-darwin)
+      rake (>= 13)
+    http_parser.rb (0.8.0)
+    i18n (1.14.5)
+      concurrent-ruby (~> 1.0)
+    jekyll (4.3.3)
+      addressable (~> 2.4)
+      colorator (~> 1.0)
+      em-websocket (~> 0.5)
+      i18n (~> 1.0)
+      jekyll-sass-converter (>= 2.0, < 4.0)
+      jekyll-watch (~> 2.0)
+      kramdown (~> 2.3, >= 2.3.1)
+      kramdown-parser-gfm (~> 1.0)
+      liquid (~> 4.0)
+      mercenary (>= 0.3.6, < 0.5)
+      pathutil (~> 0.9)
+      rouge (>= 3.0, < 5.0)
+      safe_yaml (~> 1.0)
+      terminal-table (>= 1.8, < 4.0)
+      webrick (~> 1.7)
+    jekyll-sass-converter (3.0.0)
+      sass-embedded (~> 1.54)
+    jekyll-watch (2.2.1)
+      listen (~> 3.0)
+    kramdown (2.4.0)
+      rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
+    liquid (4.0.4)
+    listen (3.9.0)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    mercenary (0.4.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
+    pathutil (0.16.2)
+      forwardable-extended (~> 2.6)
+    public_suffix (5.0.5)
     rack (3.0.11)
     rack-protection (4.0.0)
       base64 (>= 0.1.0)
@@ -13,21 +62,37 @@ GEM
     rackup (2.1.0)
       rack (>= 3)
       webrick (~> 1.8)
+    rake (13.2.1)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
+    rexml (3.2.6)
+    rouge (4.2.1)
     ruby2_keywords (0.0.5)
+    safe_yaml (1.0.5)
+    sass-embedded (1.77.0)
+      google-protobuf (>= 3.25, < 5.0)
+      rake (>= 13.0.0)
+    sass-embedded (1.77.0-x86_64-darwin)
+      google-protobuf (>= 3.25, < 5.0)
     sinatra (4.0.0)
       mustermann (~> 3.0)
       rack (>= 3.0.0, < 4)
       rack-protection (= 4.0.0)
       rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
+    terminal-table (3.0.2)
+      unicode-display_width (>= 1.1.1, < 3)
     tilt (2.3.0)
+    unicode-display_width (2.5.0)
     webrick (1.8.1)
 
 PLATFORMS
   ruby
   x86_64-darwin-23
 
 DEPENDENCIES
+  jekyll (~> 4.3)
   rackup (~> 2.1)
   sinatra