Warmup opcache in docker

.docker/php/opcache.ini

@@ -6,3 +6,5 @@ opcache.revalidate_freq=60
 opcache.fast_shutdown=1
 opcache.enable_cli=1
 opcache.enable=1
+opcache.file_cache='/tmp/opcache'
+opcache.file_update_protection=0

Dockerfile

@@ -1,24 +1,40 @@
-FROM composer:1.8 AS composer
+FROM php:7.4-cli as rector
+WORKDIR /rector
+
+# Install php extensions
+RUN apt-get update && apt-get install -y \
+        git \
+        unzip \
+        g++ \
+        libzip-dev \
+    && pecl -q install \
+        zip \
+    && docker-php-ext-configure \
+        opcache --enable-opcache \
+    && docker-php-ext-enable \
+        zip \
+        opcache
+
+# Installing composer and prestissimo globally
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+ENV COMPOSER_ALLOW_SUPERUSER=1 COMPOSER_MEMORY_LIMIT=-1
+RUN composer global require hirak/prestissimo --prefer-dist --no-progress --no-suggest --classmap-authoritative --no-plugins --no-scripts
 
-RUN composer global require hirak/prestissimo
+# Copy configuration
+COPY .docker/php/opcache.ini /usr/local/etc/php/conf.d/opcache.ini
 
 COPY composer.json composer.json
 COPY stubs stubs
 RUN  composer install --no-dev --optimize-autoloader --prefer-dist
 
+RUN mkdir /tmp/opcache
 
-FROM php:7.4-cli as rector
-WORKDIR /rector
-
-RUN docker-php-ext-configure opcache --enable-opcache \
-    && docker-php-ext-install opcache
-
-# Copy configuration
-COPY .docker/php/opcache.ini /usr/local/etc/php/conf.d/conf.d/
-
-COPY --from=composer /app .
 COPY . .
 
+# To warmup opcache a little
+RUN bin/rector list 2>&1 > /dev/null
+
 ENTRYPOINT [ "bin/rector" ]