Tighen Docker versions

Dockerfile

@@ -1,4 +1,4 @@
-FROM docker.io/library/php:8-apache
+FROM docker.io/library/php:7-apache
 
 # Use port 8080
 RUN sed -i "s/80/8080/g" /etc/apache2/sites-available/000-default.conf /etc/apache2/ports.conf
@@ -7,16 +7,18 @@ RUN sed -i "s/80/8080/g" /etc/apache2/sites-available/000-default.conf /etc/apac
 RUN apt-get update && apt-get install -y \
     libzip-dev \
     zip \
-    && docker-php-ext-install zip
+    && docker-php-ext-install zip \
+    && rm -rf /var/lib/apt/lists/*
 
 # Install composer
-COPY --from=docker.io/library/composer /usr/bin/composer /usr/bin/composer
+COPY --from=docker.io/library/composer:2 /usr/bin/composer /usr/bin/composer
 
 WORKDIR /var/www/html/
 ADD . /var/www/html/
 
 # Add user
 RUN groupadd -r user && useradd -m -r -g user user
+RUN mkdir -p /var/www/html/vendor && chown user:user /var/www/html/vendor
 USER user
 
 # Install composer dependencies