Configure GitHub Actions (#3)

Author: akondas

.github/workflows/build.yaml

@@ -0,0 +1,40 @@
+name: "Build"
+
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+jobs:
+  build:
+    name: "Build"
+    runs-on: "ubuntu-latest"
+
+    steps:
+      - name: "Checkout"
+        uses: actions/checkout@v3
+
+      - name: "Install PHP"
+        uses: "shivammathur/setup-php@v2"
+        with:
+          coverage: "pcov"
+          php-version: "8.0"
+          ini-values: memory_limit=-1
+
+      - name: "Cache Composer dependencies"
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.composer/cache
+            vendor
+          key: "php-8.0"
+          restore-keys: "php-8.0"
+
+      - name: "Validate composer"
+        run: "composer validate"
+
+      - name: "Install dependencies"
+        run: "composer install"
+
+      - name: "Run composer build"
+        run: "composer build"