deploy to heroku

.github/workflows/deploy.yml

@@ -0,0 +1,31 @@
+name: Deploy to Heroku
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+
+    - name: Set up Ruby 2.6.4
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 2.6.4
+
+    - name: Install dependencies
+      run: |
+        gem install bundler
+        bundle install
+
+    - name: Deploy to Heroku
+      env:
+        HEROKU_API_KEY: ${{ secrets.HEROKU_API_KEY }}
+      run: |
+        git remote add heroku https://git.heroku.com/sthlmrb.git
+        git push heroku master