Fix Laravel APP_KEY handling in Docker

Export the generated Laravel app key before starting Apache so deployments without an explicit APP_KEY do not fail with a 500 MissingAppKeyException.

docker/laravel-entrypoint.sh

@@ -46,6 +46,11 @@ if [ -z "$(grep '^APP_KEY=base64:' .env || true)" ]; then
     php artisan key:generate --force
 fi
 
+APP_KEY_VALUE="$(grep '^APP_KEY=' .env | tail -n 1 | cut -d '=' -f 2-)"
+if [ -n "$APP_KEY_VALUE" ]; then
+    export APP_KEY="$APP_KEY_VALUE"
+fi
+
 php artisan optimize:clear || true
 php artisan config:cache || true
 php artisan route:cache || true