add .env.example to frontend and php container and update README.md

docker/php/entrypoint.sh

@@ -18,19 +18,16 @@ if [ -f composer.json ]; then
   composer update --no-interaction --prefer-dist --optimize-autoloader
 fi
 
-if [ ! -f .env ] && [ -f .env.example ]; then
-  cp .env.example .env
-fi
+cp /tmp/app.env .env
 
-if [ -f artisan ]; then
-  if ! grep -q "APP_KEY=base64:" .env 2>/dev/null; then
-    php artisan key:generate --ansi --force
-  fi
-fi
+php artisan key:generate --force
+
+php artisan config:clear
+php artisan cache:clear
 
 php artisan migrate --force
 
-chown -R www-data:www-data storage bootstrap/cache public
+chown -R www-data:www-data public/ storage bootstrap/cache public vendor
 chmod -R 775 storage bootstrap/cache
 chmod -R 755 public