Resolve "/wp-admin redirects to :8080"

Closes #117 (closed)

wp-docker/Dockerfile

@@ -31,3 +31,4 @@ RUN echo "RemoteIPTrustedProxy $TRUSTED_PROXY_IP" >> /etc/apache2/apache2.conf
 RUN echo "RemoteIPHeader X-Forwarded-For" >> /etc/apache2/apache2.conf
 # Add custom log format called "remoteip" that uses remoteip module
 RUN echo "LogFormat \"%a %l %u %t \\\"%r\\\" %>s %O\" remoteip" >> /etc/apache2/apache2.conf
+RUN echo "UseCanonicalPhysicalPort Off" >> /etc/apache2/apache2.conf