Replace the nodesource setup script with the updated node installation steps (also update to node 20)

docker/php-fpm/Dockerfile

@@ -4,6 +4,9 @@ WORKDIR "/var/www/html"
 
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
+        curl \
+        ca-certificates \
+        gnupg \
         git \
         zip \
         unzip \
@@ -11,7 +14,11 @@ RUN apt-get update \
         curl gd intl ldap mbstring mysqli odbc pdo pdo_mysql soap sockets xml zip xdebug exif sqlite3 gettext bcmath csv event imap inotify mcrypt redis \
     && docker-php-ext-enable xdebug \
     && curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
-    && curl -sLS https://deb.nodesource.com/setup_18.x | bash - \
+    && mkdir -p /etc/apt/keyrings \
+    && curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg \
+    && NODE_MAJOR=20 \
+    && echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list \
+    && apt-get update \
     && apt-get install -y nodejs \
     && npm install -g npm \
     && apt-get install -q -y ssmtp mailutils \