Добавляем конфиг рубокопа и его запуск в CI

.github/workflows/pronto.yaml

@@ -0,0 +1,18 @@
+name: Lint
+on: pull_request
+jobs:
+  lint:
+    name: Pronto lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: git fetch --no-tags --prune --unshallow origin +refs/heads/*:refs/remotes/origin/*
+      - name: Install ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '2.6'
+          bundler-cache: true
+      - run: bundle exec pronto run -f github_status github_pr_review -c origin/master
+        env:
+          PRONTO_GITHUB_ACCESS_TOKEN: ${{ github.token }}
+          PRONTO_PULL_REQUEST_ID: ${{ github.event.pull_request.number }}

.rubocop.yml

@@ -0,0 +1,11 @@
+require:
+ - rubocop-rails
+ - rubocop-rspec
+ - rubocop-performance
+inherit_from:
+  - https://raw.githubusercontent.com/insales/code_style/master/ruby/rubocop.yml
+  - https://raw.githubusercontent.com/insales/code_style/master/ruby/rubocop_rails.yml
+
+AllCops:
+  TargetRubyVersion: 2.6
+  TargetRailsVersion: 5.2