Add GitHub action

.github/workflows/example_minitest.yml

@@ -0,0 +1,51 @@
+name: Example Schema Snapshot Test
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: example
+
+    env:
+      RAILS_ENV: test
+      DATABASE_URL: postgres://postgres:postgres@localhost:5432
+
+    services:
+      postgres:
+        image: postgres:16.3
+        env:
+          POSTGRES_USER: postgres
+          POSTGRES_PASSWORD: postgres
+        ports:
+          - 5432:5432
+        options:
+          --health-cmd="pg_isready" --health-interval=10s --health-timeout=5s
+          --health-retries=3
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          working-directory: example
+          ruby-version: .ruby-version
+          bundler-cache: true
+
+      - name: Install dependencies
+        run: bundle install
+
+      - name: Set up database
+        run: |
+          bin/rails db:create
+          bin/rails db:schema:load
+
+      - name: Run tests
+        run: bin/rails test -b

README.md

@@ -1,5 +1,7 @@
 # JSON:API Resource Schema Generation: Anchor
 
+![example](https://github.com/mattkhan/jsonapi-resources-anchor/actions/workflows/example_minitest.yml/badge.svg)
+
 Easily generate TypeScript schemas, JSON Schemas, or any schema of your choice
 from [cerebris/jsonapi-resources](https://github.com/cerebris/jsonapi-resources)
 `JSONAPI::Resource` classes.