Change HTTP port to 80.

Dockerfile

@@ -4,3 +4,5 @@ COPY ./viewer /usr/local/apache2/htdocs/
 COPY ./docker/custom-httpd.conf /usr/local/apache2/conf/httpd.conf
 
 USER www-data
+
+EXPOSE 8001

docker-compose.yml

@@ -3,5 +3,5 @@ services:
   web:
     build: .
     ports:
-     - "8001:8001"
+     - "80:8001"
     volumes: