Skip repeated apt-get update & use node v20

Dockerfile

@@ -7,29 +7,24 @@ RUN apt-get update && \
     apt-get install -y curl git zip
 
 # install basic extensions
-RUN apt-get update && \
-    apt-get install -y libxml2-dev && \
+RUN apt-get install -y libxml2-dev && \
     docker-php-ext-install bcmath ctype exif fileinfo opcache pcntl pdo_mysql xml
 
 # install php-curl extension
-RUN apt-get update && \
-    apt-get install -y libcurl3-dev && \
+RUN apt-get install -y libcurl3-dev && \
     docker-php-ext-install curl
 
 # install php-gd extension
-RUN apt-get update && \
-    apt-get install -y libfreetype6-dev libjpeg62-turbo-dev libpng-dev libwebp-dev && \
+RUN apt-get install -y libfreetype6-dev libjpeg62-turbo-dev libpng-dev libwebp-dev && \
     docker-php-ext-configure gd --with-freetype --with-jpeg --with-webp && \
     docker-php-ext-install -j$(nproc) gd
 
 # install php-gmp extension
-RUN apt-get update && \
-    apt-get install -y libgmp-dev && \
+RUN apt-get install -y libgmp-dev && \
     docker-php-ext-install gmp
 
 # install php-imagick extension
-RUN apt-get update && \
-    apt-get install -y libmagickwand-dev && \
+RUN apt-get install -y libmagickwand-dev && \
     git clone https://github.com/Imagick/imagick.git --single-branch /tmp/imagick && \
     cd /tmp/imagick && \
     phpize && \
@@ -39,8 +34,7 @@ RUN apt-get update && \
     docker-php-ext-enable imagick
 
 # install php-intl extension
-RUN apt-get update && \
-    apt-get -y install libicu-dev && \
+RUN apt-get -y install libicu-dev && \
     docker-php-ext-configure intl && \
     docker-php-ext-install intl
 
@@ -54,19 +48,17 @@ ARG xdebugVersion
 RUN if [ ! -z "$xdebugVersion" ]; then pecl install xdebug-$xdebugVersion && docker-php-ext-enable xdebug; fi
 
 # install php-zip extension
-RUN apt-get update && \
-    apt-get install -y libzip-dev && \
+RUN apt-get install -y libzip-dev && \
     docker-php-ext-install -j$(nproc) zip
 
 # install composer
 COPY --from=composer /usr/bin/composer /usr/bin/composer
 
 # install mysql client
-RUN apt-get update && \
-    apt-get install -y default-mysql-client
+RUN apt-get install -y default-mysql-client
 
 # install Node.js and npm
-RUN curl -fsSL https://deb.nodesource.com/setup_18.x | bash - && \
+RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - && \
     apt-get install -y nodejs
 
 # install Yarn package manager