apache2.conf

# see http://sources.debian.net/src/apache2/2.4.10-1/debian/config-dir/apache2.conf

Mutex file:/var/lock/apache2 default
PidFile /var/run/apache2/apache2.pid
Timeout 300
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 5
User www-data
Group www-data
HostnameLookups Off
ErrorLog /proc/self/fd/2
LogLevel warn

IncludeOptional mods-enabled/*.load
IncludeOptional mods-enabled/*.conf

# ports.conf
Listen 9000
<IfModule ssl_module>
    Listen 443
</IfModule>
<IfModule mod_gnutls.c>
    Listen 443
</IfModule>

<Directory />
    Options FollowSymLinks
    AllowOverride None
    Require all denied
</Directory>

<Directory /app>
    AllowOverride All
    Require all granted
</Directory>

DocumentRoot /app

AccessFileName .htaccess
<FilesMatch "^\.ht">
    Require all denied
</FilesMatch>

LogFormat "%v:%p %h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined
LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %O" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent

CustomLog /proc/self/fd/1 combined

<FilesMatch \.php$>
    SetHandler application/x-httpd-php
</FilesMatch>

# Multiple DirectoryIndex directives within the same context will add
# to the list of resources to look for rather than replace
# https://httpd.apache.org/docs/current/mod/mod_dir.html#directoryindex
DirectoryIndex disabled
DirectoryIndex index.php index.html

IncludeOptional conf-enabled/*.conf
IncludeOptional sites-enabled/*.conf