Added rubocop for style checking; added woodpecker CI config

.rubocop.yml

@@ -0,0 +1,21 @@
+require: rubocop-sequel
+
+AllCops:
+  NewCops: enable
+
+Layout/EmptyLinesAroundClassBody:
+  EnforcedStyle: 'empty_lines_except_namespace'
+Layout/EmptyLinesAroundModuleBody:
+  EnforcedStyle: 'empty_lines_except_namespace'
+Metrics/ClassLength:
+  Max: 150
+Style/ClassVars:
+  Enabled: false
+Style/GlobalVars:
+  Enabled: false
+Style/MethodCallWithoutArgsParentheses:
+  Enabled: false
+Style/MethodCallWithArgsParentheses:
+  Enabled: true
+Style/RedundantReturn:
+  Enabled: false

.woodpecker.yml

@@ -0,0 +1,19 @@
+pipeline:
+  style:
+    image: ruby:3.0
+    commands:
+      - 'gem install rake'
+      - 'bundle config set --local path "vendor/bundle"'
+      - 'bundle install'
+      - 'rake test:rubocop'
+
+  gitea_release:
+    image: plugins/gitea-release
+    settings:
+      api_key:
+        from_secret: gitea_api_key
+      base_url: https://git.metaunix.net
+      title: "${CI_COMMIT_TAG}"
+    when:
+      event: tag
+

Gemfile

@@ -10,4 +10,8 @@ gem 'sqlite3', '~> 1.6'
 group :development, :test do
   gem 'rerun'
   gem 'wdm', '>= 0.1.0' if Gem.win_platform?
+
+  # rubocop and extensions for code style
+  gem 'rubocop'
+  gem 'rubocop-sequel'
 end

Rakefile

@@ -22,3 +22,10 @@ namespace :server do
     system('rerun --no-notify --exit --dir="src/" puma')
   end
 end
+
+namespace :test do
+  task :rubocop do
+    system("rubocop app/ server.rb scan.rb")
+  end
+end
+