feat: add containerized deployment workflow

.github/tests/test_and_check_app/action.yml

@@ -0,0 +1,18 @@
+name: test_and_check_app
+description: Build the test image and run all application checks
+
+runs:
+  using: composite
+  steps:
+    - name: Test and check app
+      shell: bash
+      run: |
+        set -Eeuo pipefail
+
+        docker buildx build \
+          --file Dockerfile \
+          --target test \
+          --tag "local/kanbangit-test:${GITHUB_SHA}" \
+          --progress plain \
+          --load \
+          .

.github/tests/tests.yml

@@ -1,48 +0,0 @@
-name: tests
-
-on:
-  push:
-    branches:
-      - main
-  pull_request:
-
-jobs:
-  ci:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        php-version: ['8.4']
-
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v6
-
-      - name: Setup PHP
-        uses: shivammathur/setup-php@v2
-        with:
-          php-version: ${{ matrix.php-version }}
-          tools: composer:v2
-          coverage: xdebug
-
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: '22'
-
-      - name: Install Node Dependencies
-        run: npm i --from-lock-file
-
-      - name: Install Dependencies
-        run: composer install --no-interaction --prefer-dist --optimize-autoloader
-
-      - name: Copy Environment File
-        run: cp .env.example .env
-
-      - name: Generate Application Key
-        run: php artisan key:generate
-
-      - name: Build Assets
-        run: npm run build
-
-      - name: Tests
-        run: composer ci:check