Add bcmath extension

Author: nickygerritsen

docker-contributor/Dockerfile

@@ -26,7 +26,7 @@ RUN apt-get update \
     gcc g++ make zip unzip mariadb-client \
     nginx php8.3 php8.3-cli php8.3-fpm php8.3-zip \
     php8.3-gd php8.3-curl php8.3-mysql php8.3-intl \
-    php8.3-gmp php8.3-xml php8.3-mbstring php8.3-xdebug php8.3-pcov \
+    php8.3-gmp php8.3-xml php8.3-mbstring php8.3-xdebug php8.3-pcov php8.3-bcmath \
     bsdmainutils ntp lsof \
     linuxdoc-tools linuxdoc-tools-text groff \
     python3-sphinx python3-sphinx-rtd-theme python3-pip fontconfig python3-yaml \