Add workflow

.gitea/workflows/ci.yml

@@ -0,0 +1,33 @@
+name: CI Pipeline
+on:
+  pull_request:
+    branches:
+      - '*'
+  push:
+    branches:
+      - master
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: false
+jobs:
+  build:
+    runs-on: ruby-latest
+    env:
+      RAILS_ENV: test
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Cache Ruby gems
+        uses: actions/cache@v4
+        with:
+          path: vendor/bundle
+          key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-gems-
+
+      - name: Install Ruby dependencies
+        run: bundle install --path vendor/bundle
+
+      - name: Run tests and linting
+        run: bundle exec rake