Need some assistance with my apache2 site config file - php

Question

I'm trying to get apache2 to point to a PHP based application (word press in this case but the config needs to be generic enough to work for any php application).
and it either displays some basic HTML file access page or errors with "You don't have permission". I don't really know apache and I don't know PHP at all. Here's my current site_config file as it stands(with retractions replaced with ):
<VirtualHost *:80>
ServerAdmin <app_user>#localhost
ServerName amazonaws.com/<app_name>
ServerAlias *.amazonaws.com/<app_name>
DocumentRoot /home/<app_user>/<app_location>/staging/current
<Directory /home/<app_user>/<app_location>/staging/current >
AllowOverride All
Options -Indexes
Order allow,deny
Allow from all
</Directory>
LogLevel error
ErrorLog ${APACHE_LOG_DIR}/error.log
</VirtualHost>
I would also like to make it so you can have multiple websites on the same box but I'm not sure how to change the VirtualHost arg *:80 to account for that, I just get loads of ignoring errors.
I also have the following line in my apache2.conf:
DirectoryIndex index.php index.html
Folder permissions are set to 0755 for all files & folders in the project directory
output of apache2 -v:
Server version: Apache/2.4.7 (Ubuntu)
P.s. I know nothing about PHP and very little about apache2 so for this, speak to me as a total noob.

Answer 1

To solve The first problem I had to change the following lines:
Order allow,deny
Allow from all
to:
Require all granted
this finally allowed apache to allow users access to the folders, the second thing was to add an alias:
Alias /<app_name> "/home/<app_user>/<app_location>/staging/current"
and it started working as expected so now my site config looks like:
Alias /<app_name>"/home/<app_user>/<app_name>/<app_environment>/current"
<Directory "/<app_name>"/home/<app_user>/<app_name>/<app_environment>/current">
AllowOverride All
Options -Indexes
Require all granted
</Directory>
<VirtualHost *:80>
DocumentRoot "/<app_name>"/home/<app_user>/<app_name>/<app_environment>/current"
ErrorLog "/var/log/apache2/<app_name>.error_log"
CustomLog "/var/log/apache2/<app_name>.access_log" combined
</VirtualHost>