tambah dockerfile untuk railway dan ext-gd

Dockerfile

@@ -0,0 +1,26 @@
+FROM php:8.2-cli
+
+RUN apt-get update && apt-get install -y \
+    git \
+    unzip \
+    curl \
+    libpng-dev \
+    libjpeg62-turbo-dev \
+    libfreetype6-dev \
+    libzip-dev \
+    zip \
+    libonig-dev \
+    libxml2-dev \
+    libicu-dev \
+    && docker-php-ext-configure gd --with-freetype --with-jpeg \
+    && docker-php-ext-install pdo pdo_mysql mbstring zip intl gd
+
+COPY --from=composer:2 /usr/bin/composer /usr/bin/composer
+
+WORKDIR /app
+
+COPY . /app
+
+RUN composer install --no-interaction --optimize-autoloader --no-dev
+
+CMD php artisan serve --host=0.0.0.0 --port=${PORT:-8080}