Add static code analysis configuration files: rubocop, reek, erb-lint

.erb-lint.yml

@@ -0,0 +1,11 @@
+---
+EnableDefaultLinters: true
+linters:
+  ErbSafety:
+    enabled: true
+    better_html_config: .better-html.yml
+  Rubocop:
+    enabled: true
+    rubocop_config:
+      inherit_from:
+        - .rubocop.yml

.reek.yml

@@ -0,0 +1,4 @@
+---
+detectors:
+  InstanceVariableAssumption:
+    enabled: false

.rubocop.yml

@@ -0,0 +1,13 @@
+inherit_from: ~/.rubocop.yml
+
+Lint/ShadowingOuterLocalVariable:
+  Enabled: false
+
+Metrics/ClassLength:
+  Enabled: false
+
+Style/Documentation:
+  Enabled: false
+
+
+

Gemfile.lock

@@ -145,6 +145,7 @@ GEM
       thor (>= 0.14, < 2.0)
     jsbundling-rails (1.0.2)
       railties (>= 6.0.0)
+    json (2.6.2)
     jwt (1.5.6)
     launchy (2.5.0)
       addressable (~> 2.7)
@@ -264,7 +265,8 @@ GEM
       rspec-mocks (~> 3.10)
       rspec-support (~> 3.10)
     rspec-support (3.11.0)
-    rubocop (1.30.1)
+    rubocop (1.31.2)
+      json (~> 2.3)
       parallel (~> 1.10)
       parser (>= 3.1.0.0)
       rainbow (>= 2.2.2, < 4.0)
@@ -313,7 +315,7 @@ GEM
       concurrent-ruby (~> 1.0)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
-    unicode-display_width (2.1.0)
+    unicode-display_width (2.2.0)
     uniform_notifier (1.16.0)
     warden (1.2.9)
       rack (>= 2.0.9)