Docker PHP + Apache deployment on Heroku crashes

I am new to Heroku. I am trying to deploy a docker container and although I have tried several options, it always crashes. On local in works fine, on port 8080.

Right now, I am using PHP + Apache.

My folder herarchy looks like this:

docker-compose.yml
Dockerfile 
www
   .htaccess
   index.php

My Dockerfile is this one:

FROM php:7.1-apache
COPY www /var/www/html
RUN a2enmod rewrite
RUN a2enmod lbmethod_byrequests
RUN service apache2 restart
EXPOSE 80
CMD ["/usr/sbin/apache2ctl", "-D", "FOREGROUND"]

My docker-composer.yml:

version: '3'
services:
  web:
    build:
      context: .
      dockerfile: ./Dockerfile
    image: myproject
    ports:
      - 8080:80

And the .htaccess:

RewriteEngine on 
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.*)$ $1.php [NC,L]

When I check the Heroku logs (heroku logs --tail), this is what I see:

Starting process with command `/usr/sbin/apache2ctl -D FOREGROUND`
State changed from starting to crashed
Process exited with status 1
(13)Permission denied: AH00072: make_sock: could not bind to address [::]:80
(13)Permission denied: AH00072: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
AH00015: Unable to open logs
Action '-D FOREGROUND' failed.

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