add php-fpm entrypoint file

caddy2/php7.4-debian/Dockerfile

@@ -12,6 +12,7 @@ COPY --from=caddy /data /data
 COPY --from=caddy /usr/bin/caddy /usr/bin/caddy
 COPY Caddyfile /etc/caddy/
 
+COPY config $PHP_INI_DIR/conf.d
 COPY php-fpm /usr/local/etc/php-fpm.d
 RUN mv "$PHP_INI_DIR/php.ini-production" "$PHP_INI_DIR/php.ini"
 

caddy2/php7.4-debian/config/opcache.ini

@@ -0,0 +1,7 @@
+opcache.enable=1
+
+opcache.memory_consumption=256
+opcache.interned_strings_buffer=16
+opcache.fast_shutdown=1
+
+opcache.validate_timestamps=1

caddy2/php7.4-debian/config/upload.ini

@@ -0,0 +1,2 @@
+post_max_size=100M
+upload_max_filesize=100M

caddy2/php7.4-debian/php-caddy-entrypoint

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+set -e
+
+FPM_CONFIG_DIR=/usr/local/etc/php-fpm.d
+
+read_env_config() {
+    prefix=$1
+    output=$2
+
+    env | grep -E "^$prefix\..+=.+" | while IFS='=' read -r config_name config_value; do
+        echo "${config_name#*.} = $config_value" >> "$output"
+    done
+}
+
+read_env_config PHP $PHP_INI_DIR/conf.d/zz-docker-env.ini
+read_env_config PHP_FPM $FPM_CONFIG_DIR/zz-docker.conf
+
+php-fpm -D
+exec "$@"