add github workflow

Author: svnldwg

.github/workflows/check.yml

@@ -0,0 +1,50 @@
+name: Code Check
+
+on:
+  push:
+    branches:
+      - '**'
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  run:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        php: ['7.4']
+
+    name: PHP ${{ matrix.php }} Test on ${{ matrix.os }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          tools: composer
+
+      - name: Validate composer.json and composer.lock
+        run: composer validate
+
+      - name: Get Composer Cache Directory
+        id: composer-cache
+        run: |
+          echo "::set-output name=dir::$(composer config cache-files-dir)"
+
+      - name: Cache composer dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-composer-
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress
+
+      - name: Code check
+        run: composer check

composer.json

@@ -18,5 +18,13 @@
         "psr-4": {
             "LambdaPhpSkeleton\\": "src/"
         }
+    },
+    "scripts": {
+        "check": [
+            "@cs-check",
+            "@phpstan"
+        ],
+        "cs-check": "php-cs-fixer fix --config=dev/php-cs-fixer.php_cs --dry-run --diff",
+        "phpstan": "phpstan analyse -c dev/phpstan.neon --no-progress"
     }
 }