get working with github actions

.github/workflows/main.yml

@@ -0,0 +1,27 @@
+name: Rails Tests
+
+on:
+  push:
+    branches:
+      - master
+
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Rails tests
+    strategy:
+      matrix:
+        ruby:
+          - '3.2.2'
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Run the default task
+        run: bin/rails test