feat: Add env file existince check for test suite

packages/backend/.env-example.test

@@ -0,0 +1,16 @@
+APP_ENV=test
+HOST=localhost
+PROTOCOL=http
+PORT=3000
+LOG_LEVEL=debug
+WEBHOOK_SECRET_KEY=secret
+POSTGRES_DATABASE=automatisch_test
+POSTGRES_PORT=5432
+POSTGRES_HOST=localhost
+POSTGRES_USERNAME=automatisch_test_user
+POSTGRES_PASSWORD=
+POSTGRES_ENABLE_SSL=false
+ENCRYPTION_KEY=secret
+APP_SECRET_KEY=secret
+REDIS_PORT=6379
+REDIS_HOST=127.0.0.1