Add rewrites for manifests

Part-of: <https://dev.funkwhale.audio/funkwhale/funkwhale/-/merge_requests/2039>

deploy/nginx.template

@@ -148,4 +148,8 @@ server {
         alias   ${MUSIC_DIRECTORY_SERVE_PATH};
         add_header Access-Control-Allow-Origin '*';
     }
+
+    location /manifest.json {
+           return 302 /api/v1/instance/spa-manifest.json;
+      }
 }

docker/nginx/conf.dev

@@ -140,5 +140,9 @@ http {
             alias   /music/;
             add_header Access-Control-Allow-Origin '*';
         }
+
+        location /manifest.json {
+            return 302 /api/v1/instance/spa-manifest.json;
+        }
     }
 }

front/docker/funkwhale.conf.template

@@ -113,4 +113,8 @@ server {
         alias   ${MUSIC_DIRECTORY_PATH}/;
         add_header Access-Control-Allow-Origin '*';
     }
+
+    location /manifest.json {
+        return 302 /api/v1/instance/spa-manifest.json;
+    }
 }