chore(docker): remove Composer process timeout and git installation, update README for vendor folder setup

Dockerfile

@@ -1,19 +1,12 @@
-FROM docker.arvancloud.ir/php:8.4-fpm-bookworm AS app
+FROM php:8.4-fpm-bookworm AS app
 WORKDIR /var/www/html
 
 ENV COMPOSER_ALLOW_SUPERUSER=1
-ENV COMPOSER_PROCESS_TIMEOUT=600
 
-COPY docker/apt/debian.sources /etc/apt/sources.list.d/debian.sources
-
-RUN apt-get -o Acquire::Check-Valid-Until=false update \
-    && apt-get install -y --allow-downgrades --no-install-recommends \
-        libssl3=3.0.18-1~deb12u1 \
-        openssl=3.0.18-1~deb12u1 \
-        libssl-dev=3.0.18-1~deb12u1 \
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
         default-mysql-client \
         default-libmysqlclient-dev \
-        git \
         libicu-dev \
         libzip-dev \
         unzip \
@@ -32,18 +25,12 @@ COPY docker/php/php.ini /usr/local/etc/php/conf.d/99-production.ini
 COPY docker/php/opcache.ini /usr/local/etc/php/conf.d/99-opcache.ini
 
 COPY composer.json composer.lock ./
-RUN composer config repos.packagist composer https://mirror-composer.runflare.com \
-    && composer config --global process-timeout 600 \
-    && composer install \
-        --no-dev \
-        --no-autoloader \
-        --no-scripts \
-        --prefer-dist \
-        --no-interaction \
+COPY vendor ./vendor
+RUN test -f vendor/autoload.php || (echo "ERROR: vendor folder is missing. Run: composer install --no-dev" >&2 && exit 1) \
+    && composer dump-autoload --no-dev --optimize --no-scripts \
     && composer check-platform-reqs --no-dev
 
 COPY . .
-# COPY --from=assets /app/public/build ./public/build
 
 RUN composer dump-autoload --no-dev --optimize --no-scripts \
     && php artisan package:discover --ansi \
@@ -68,9 +55,7 @@ EXPOSE 9000
 ENTRYPOINT ["docker-entrypoint"]
 CMD ["php-fpm"]
 
-FROM docker.arvancloud.ir/nginx:1.27-alpine AS nginx
-
-RUN sed -i 's|https://dl-cdn.alpinelinux.org|https://mirror.arvancloud.ir/alpine|g' /etc/apk/repositories
+FROM nginx:1.27-alpine AS nginx
 
 COPY docker/nginx/default.conf /etc/nginx/conf.d/default.conf
 COPY --from=app /var/www/html/public /var/www/html/public