Fixed problems in dispatcher, fixed testcase download error

deploy/entrypoint.sh

@@ -52,6 +52,7 @@ do
     python manage.py migrate --no-input &&
     python manage.py inituser --username=root --password=rootroot --action=create_super_admin &&
     echo "from options.options import SysOptions; SysOptions.judge_server_token='$JUDGE_SERVER_TOKEN'" | python manage.py shell &&
+    echo "from conf.models import JudgeServer; JudgeServer.objects.update(task_number=0)" | python manage.py shell &&
     break
     n=$(($n+1))
     echo "Failed to migrate, going to retry..."

deploy/nginx/locations.conf

@@ -6,11 +6,6 @@ location /api {
     include api_proxy.conf;
 }
 
-location /data/ {
-    internal;
-    alias /data/; # note that trailing slash
-}
-
 location /admin {
     root /app/dist/admin;
     try_files $uri $uri/ /index.html =404;