build: 🔥 properly set up debugging env etc.

Gemfile.lock

@@ -7,27 +7,41 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    backport (1.2.0)
+    benchmark (0.2.1)
     coderay (1.1.3)
     debug (1.6.2)
       irb (>= 1.3.6)
       reline (>= 0.3.1)
+    diff-lcs (1.5.0)
+    e2mmap (0.1.0)
     io-console (0.5.11)
     irb (1.4.1)
       reline (>= 0.3.0)
+    jaro_winkler (1.5.4)
     json (2.6.3)
+    kramdown (2.4.0)
+      rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
     method_source (1.0.0)
     minitest (5.18.0)
+    nokogiri (1.14.2-x86_64-linux)
+      racc (~> 1.4)
     parallel (1.22.1)
     parser (3.2.1.1)
       ast (~> 2.4.1)
     pry (0.14.1)
       coderay (~> 1.1)
       method_source (~> 1.0)
+    racc (1.6.2)
     rainbow (3.1.1)
     rake (13.0.6)
     regexp_parser (2.7.0)
     reline (0.3.1)
       io-console (~> 0.5)
+    reverse_markdown (2.1.1)
+      nokogiri
     rexml (3.2.5)
     rubocop (1.48.0)
       json (~> 2.3)
@@ -42,7 +56,27 @@ GEM
     rubocop-ast (1.27.0)
       parser (>= 3.2.1.0)
     ruby-progressbar (1.13.0)
+    solargraph (0.48.0)
+      backport (~> 1.2)
+      benchmark
+      bundler (>= 1.17.2)
+      diff-lcs (~> 1.4)
+      e2mmap
+      jaro_winkler (~> 1.5)
+      kramdown (~> 2.3)
+      kramdown-parser-gfm (~> 1.1)
+      parser (~> 3.0)
+      reverse_markdown (>= 1.0.5, < 3)
+      rubocop (>= 0.52)
+      thor (~> 1.0)
+      tilt (~> 2.0)
+      yard (~> 0.9, >= 0.9.24)
+    thor (1.2.1)
+    tilt (2.1.0)
     unicode-display_width (2.4.2)
+    webrick (1.7.0)
+    yard (0.9.28)
+      webrick (~> 1.7.0)
 
 PLATFORMS
   x86_64-linux
@@ -54,6 +88,7 @@ DEPENDENCIES
   pry
   rake (~> 13.0)
   rubocop (~> 1.21)
+  solargraph (~> 0.48)
 
 BUNDLED WITH
    2.3.22