Add github action workflows

- [x] Run RSpec suit

.github/workflows/main.yml

@@ -0,0 +1,20 @@
+name: Run rake task
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby-version: [3.1, 2.7.5]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby ${{ matrix.ruby-version }}
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby-version }}
+        bundler-cache: true
+    - name: Run rake task
+      run: bundle exec rake