Improvement of Apache config consistency and ease of configuration

deploy/apache.conf

@@ -5,7 +5,9 @@ Define funkwhale-sn funkwhale.yourdomain.com
 # use different configuration than what is described in our installation guide.
 Define funkwhale-api http://localhost:5000
 Define funkwhale-api-ws ws://localhost:5000
-Define MUSIC_DIRECTORY_PATH /srv/funkwhale/data/music
+Define FUNKWHALE_ROOT_PATH /srv/funkwhale
+Define MUSIC_DIRECTORY_PATH ${FUNKWHALE_ROOT_PATH}/data/music
+Define MEDIA_DIRECTORY_PATH ${FUNKWHALE_ROOT_PATH}/data/media
 
 # HTTP requests redirected to HTTPS
 <VirtualHost *:80>
@@ -90,17 +92,17 @@ Define MUSIC_DIRECTORY_PATH /srv/funkwhale/data/music
    <Location "/front">
       ProxyPass  "!"
    </Location>
-   Alias /front /srv/funkwhale/front/dist
+   Alias /front ${FUNKWHALE_ROOT_PATH}/front/dist
 
    <Location "/media">
       ProxyPass  "!"
    </Location>
-   Alias /media /srv/funkwhale/data/media
+   Alias /media ${MEDIA_DIRECTORY_PATH}
 
    <Location "/staticfiles">
       ProxyPass  "!"
    </Location>
-   Alias /staticfiles /srv/funkwhale/data/static
+   Alias /staticfiles ${FUNKWHALE_ROOT_PATH}/data/static
 
    # Activating WebSockets
    <Location "/api/v1/activity">
@@ -108,19 +110,19 @@ Define MUSIC_DIRECTORY_PATH /srv/funkwhale/data/music
    </Location>
 
    # Setting appropriate access levels to serve frontend
-   <Directory "/srv/funkwhale/data/static">
+   <Directory "${FUNKWHALE_ROOT_PATH}/data/static">
       Options FollowSymLinks
       AllowOverride None
       Require all granted
    </Directory>
 
-   <Directory /srv/funkwhale/front/dist>
+   <Directory "${FUNKWHALE_ROOT_PATH}/front/dist">
       Options FollowSymLinks
       AllowOverride None
       Require all granted
    </Directory>
 
-   <Directory /srv/funkwhale/data/media>
+   <Directory "${MEDIA_DIRECTORY_PATH}">
       Options FollowSymLinks
       AllowOverride None
       Require all granted
@@ -133,7 +135,7 @@ Define MUSIC_DIRECTORY_PATH /srv/funkwhale/data/music
    #LoadModule xsendfile_module modules/mod_xsendfile.so
    <IfModule mod_xsendfile.c>
       XSendFile On
-      XSendFilePath /srv/funkwhale/data/media
+      XSendFilePath ${MEDIA_DIRECTORY_PATH}
       XSendFilePath ${MUSIC_DIRECTORY_PATH}
       SetEnv MOD_X_SENDFILE_ENABLED 1
    </IfModule>