fix(front/nginx): fix 404 response on listen URLs

front/docker/funkwhale.template

@@ -82,7 +82,7 @@ server {
     # has been checked on API side
     location /_protected/media/ {
         internal;
-        alias   ${MEDIA_ROOT};
+        alias   ${MEDIA_ROOT}/;
 
     }
     # Comment the previous location and uncomment this one if you're storing
@@ -100,7 +100,7 @@ server {
         # has been checked on API side
         # Set this to the same value as your MUSIC_DIRECTORY_PATH setting
         internal;
-        alias   ${MUSIC_DIRECTORY_PATH};
+        alias   ${MUSIC_DIRECTORY_PATH}/;
     }
 
     location /staticfiles/ {