Move around docker storage folders/config

resources/docker/php/Dockerfile

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+FROM php:7.3-fpm-alpine
+
+#RUN apt-get update
+#RUN apt-get install -y libgmp-dev
+RUN apk add gmp-dev
+
+# Copy any config files in
+COPY ext-opcache.ini $PHP_INI_DIR/conf.d/
+
+RUN ln -sf /dev/stderr /var/log/fpm-error.log
+
+RUN docker-php-ext-install \
+  pdo_mysql \
+  gmp \
+  opcache

resources/docker/php/ext-opcache.ini

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+[opcache]
+opcache.enable = 1
+opcache.memory_consumption = 128
+opcache.interned_strings_buffer = 8
+opcache.max_accelerated_files = 4000
+opcache.revalidate_freq = 60
+opcache.fast_shutdown = 1
+opcache.enable_cli = 1

resources/docker/php/www.conf

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+[www]
+
+user = www-data
+group = www-data
+
+listen = :9000
+
+pm = dynamic
+pm.max_children = 5
+pm.start_servers = 2
+pm.min_spare_servers = 1
+pm.max_spare_servers = 3
+
+php_flag[display_errors] = on
+php_admin_flag[log_errors] = on