update dockerfile

Author: zhengkunwang223

php/7.0.33/Dockerfile

@@ -6,7 +6,7 @@
 
 FROM php:7.0.33-fpm AS php-source
 
-FROM debian:bookworm-slim
+FROM debian:bullseye-slim
 ARG INSTALL_EXT_VERSION
 
 # prevent Debian's PHP packages from being installed

php/7.1.33/Dockerfile

@@ -5,7 +5,7 @@
 #
 FROM php:7.1.33-fpm AS php-source
 
-FROM debian:bookworm-slim
+FROM debian:bullseye-slim
 ARG INSTALL_EXT_VERSION
 
 # prevent Debian's PHP packages from being installed

php/7.2.34/Dockerfile

@@ -5,7 +5,7 @@
 #
 FROM php:7.2.34-fpm AS php-source
 
-FROM debian:bookworm-slim
+FROM debian:bullseye-slim
 ARG INSTALL_EXT_VERSION
 
 # prevent Debian's PHP packages from being installed
@@ -24,8 +24,7 @@ ENV PHPIZE_DEPS \
 		dpkg-dev \
 		file \
 		g++ \
-		gcc-8 \
-		g++-8 \
+		gcc \
 		libc-dev \
 		make \
 		pkg-config \
@@ -40,8 +39,6 @@ RUN set -eux; \
 		curl \
 		xz-utils \
 	; \
-    update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 80 && \
-    update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-8 80 && \
 	rm -rf /var/lib/apt/lists/*
 
 ENV PHP_INI_DIR /usr/local/etc/php