I have 2 docker containers: WordPress exposing port 443, and ownCloud exposing port 8080. Can I add a Perl/httpd container to run exposing port 80?

Question

I have 2 docker containers: WordPress exposing port 443, and ownCloud exposing port 8080. Can I add a Perl/httpd container to run exposing port 80?

WordPress includes services wordpress:6.7.2-php8.1-apache and mysql:8.0 (on 3306). ownCloud includes services owncloud/server:10.14 and mariadb:10.11

I have created a Dockerfile for Perl/httpd:

FROM httpd:latest
RUN apt-get update && apt-get -y install \
    libapache2-mod-perl2 \
    libemail-sender-perl \
    libemail-simple-perl \
    libemail-valid-perl \
    libfile-finder-perl \
    libcgi-pm-perl \
    libtry-tiny-perl \
    libfile-fcntllock-perl \
    libjson-perl \
    libdatetime-locale-perl \
    perl

and an override for httpd.conf, including:

Listen 80

<IfModule !mpm_prefork_module>
    LoadModule cgid_module modules/mod_cgid.so
</IfModule>

DocumentRoot "/usr/local/apache2/htdocs"
<Directory "/usr/local/apache2/htdocs">
    Options Indexes FollowSymLinks
    AllowOverride None
    Require all granted
</Directory>

<Directory "/usr/local/apache2/cgi-bin">
    AllowOverride None
    Require all granted
    Options +ExecCGI
    AddHandler cgi-script .pl
</Directory>

and docker-compose.yml:

version: "3"

  volumes:
    web:
      external: true

  services:
    apache-perl:
      image: apache-perl
      restart: always 
      ports:
        - 80:80
      volumes:
        - web:/usr/local/apache2:rw
        - ./web-httpd.conf:/usr/local/apache2/conf/httpd.conf:ro
        - /opt1/bitnami-wordpress/apache2/htdocs:/usr/local/apache2/htdocs:ro
        - /opt1/bitnami-wordpress/apache2/cgi-bin:/usr/local/apache2/cgi-bin:ro
        - /opt1/wordpress-bitnami/apache2/logs:/usr/local/apache2/logs:rw

and all my *.pl and *.cgi files in the cgi-bin folder have the execute attribute.

Note that all 3 containers should have the same URL, but with different ports.

Why do I get the following message?

This site can’t be reached hollandnumerics.org.uk refused to connect. Try: Checking the connection Checking the proxy and the firewall ERR_CONNECTION_REFUSED