chore: run rspec in github actions

.github/workflows/rspec.yaml

@@ -0,0 +1,32 @@
+name: CI
+
+on: [pull_request]
+
+jobs:
+  rspec:
+    runs-on: ubuntu-latest
+      container:
+        image: ruby:3.0.6
+
+      steps:
+        - uses: actions/checkout@v1
+
+        - name: Gem cache
+          id: cache-bundle
+          uses: actions/cache@v1
+          with:
+            path: vendor/bundle
+            key: bundle-${{ hashFiles('**/Gemfile.lock') }}
+
+        - name: Bundle install
+          env:
+            RAILS_ENV: test
+          run: |
+            gem install bundler
+            bundle install --jobs 4 --retry 3 --path vendor/bundle
+
+        - name: Setup DB, Run tests
+          env:
+            RAILS_ENV: test
+          run: |
+            bundle exec rspec