diff --git a/Handler/Shared.hs b/Handler/Shared.hs
index 41f2e92..ad530ab 100644
--- a/Handler/Shared.hs
+++ b/Handler/Shared.hs
@@ -96,7 +96,13 @@ browsableGitRepo bareRepoName
 
 
 runViewProgress :: (Channel -> Handler ()) -> Handler TypedContent
-runViewProgress = runViewProgress' ViewProgressR
+runViewProgress action = do
+  app <- getYesod
+  let viewingProgressStyle = appViewingProgressStyle $ appSettings app
+  runViewProgress' (case viewingProgressStyle of
+                       WithWebSockets -> ViewProgressWithWebSocketsR
+                       WithPlainText -> ViewProgressR)
+                   action
 
 runOpenViewProgress :: (Channel -> Handler ()) -> Handler TypedContent
 runOpenViewProgress = runViewProgress' OpenViewProgressR
@@ -147,6 +153,10 @@ getViewProgressWithWebSocketsR jobId = do
                 background-color: black;
                 padding: 10pt;
             }
+            #outwindow pre {
+                color: white;
+                background-color: black;
+            }
             #wait {
                animation: blink 1s linear infinite;
             }
@@ -172,7 +182,7 @@ getViewProgressWithWebSocketsR jobId = do
             conn = new WebSocket(url);
 
             conn.onmessage = function(e) {
-                var p = document.createElement("p");
+                var p = document.createElement("pre");
                 p.appendChild(document.createTextNode(e.data));
                 output.appendChild(p);
             };
diff --git a/Handler/ShowChallenge.hs b/Handler/ShowChallenge.hs
index ac6d001..a5612de 100644
--- a/Handler/ShowChallenge.hs
+++ b/Handler/ShowChallenge.hs
@@ -1334,12 +1334,12 @@ challengeLayout withHeader challenge widget = do
     $(widgetFile "challenge")
 
 getTestProgressR :: Int -> Handler TypedContent
-getTestProgressR m = runViewProgressWithWebSockets $ doTestProgress m
+getTestProgressR m = runViewProgress $ doTestProgress m
 
 doTestProgress :: Int -> Channel -> Handler ()
 doTestProgress m chan = do
   forM [1..m] $ (\i -> do
-                    msg chan $ (Data.Text.pack $ show i)
+                    msg chan $ (Data.Text.pack $ ("GO\n" ++ show i))
                     liftIO $ threadDelay 1000000
                     return ())
   return ()
diff --git a/Settings.hs b/Settings.hs
index fcedb22..cf64414 100644
--- a/Settings.hs
+++ b/Settings.hs
@@ -42,6 +42,17 @@ toLeaderboardStyle :: Text -> LeaderboardStyle
 toLeaderboardStyle "by-tag" = ByTag
 toLeaderboardStyle _ = BySubmitter
 
+-- How showing progress for asynchronous operations
+-- such as creating a challenge, submitting a submission, etc.
+-- is realized technically.
+data ViewingProgressStyle = WithWebSockets | WithPlainText
+                            deriving (Eq, Show)
+
+toViewingProgressStyle :: Text -> ViewingProgressStyle
+toViewingProgressStyle "with-web-sockets" = WithWebSockets
+toViewingProgressStyle _ = WithPlainText
+
+
 -- | Runtime settings to configure this application. These settings can be
 -- loaded from various sources: defaults, environment variables, config files,
 -- theoretically even a database.
@@ -96,6 +107,7 @@ data AppSettings = AppSettings
     -- ^ Are challenges, submission, etc. visible without logging in
     , appIsPublic :: Bool
     , appJSONWebKey :: Maybe JWK.Jwk
+    , appViewingProgressStyle   :: ViewingProgressStyle
     }
 
 instance FromJSON AppSettings where
@@ -143,6 +155,8 @@ instance FromJSON AppSettings where
 
         appJSONWebKey             <- o .:? "json-web-key"
 
+        appViewingProgressStyle   <- toViewingProgressStyle <$> o .: "viewing-progress-style"
+
         return AppSettings {..}
 
 -- | Settings for 'widgetFile', such as which template languages to support and
diff --git a/config/settings.yml b/config/settings.yml
index 7b4040f..d511a44 100644
--- a/config/settings.yml
+++ b/config/settings.yml
@@ -17,6 +17,15 @@ new-best-result-slack-hook: "_env:NEW_BEST_RESULT_SLACK_HOOK:"
 server-ssh-public-key: "_env:SERVER_SSH_PUBLIC_KEY:"
 is-public:    "_env:IS_PUBLIC:true"
 
+# How the output of asynchronous operations is presented
+# - with-plain-text - just plain text shown by the browser;
+#   pros: it works with anything, cons: with NGINX the output
+#   is not shown progressively, only when it is finished
+# - with-web-sockets - using web sockets and JavaScripts, pros:
+#   nicer visually, fully works with NGINX, cons: does not work
+#   with lighttpd
+viewing-progress-style: "_env:VIEWING_PROGRESS_STYLE:with-plain-text"
+
 # Optional values with the following production defaults.
 # In development, they default to the inverse.
 #
diff --git a/docker-compose.yml b/docker-compose.yml
index eefcddb..5301898 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -26,6 +26,7 @@ services:
       - AUTO_OPENING=${GONITO_AUTO_OPENING:-false}
       - IS_PUBLIC=${GONITO_IS_PUBLIC:-true}
       - JSON_WEB_KEY=${JSON_WEB_KEY}
+      - VIEWING_PROGRESS_STYLE=${GONITO_VIEWING_PROGRESS_STYLE:-with-web-sockets}
     expose:
       - "3000"
     volumes:
diff --git a/nginx.conf b/nginx.conf
index d21ba9f..b85c32a 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -22,10 +22,11 @@ http {
       proxy_pass http://gonito;
       proxy_redirect off;
 
-      proxy_read_timeout     600;
-      proxy_connect_timeout  600;
+      proxy_read_timeout     6000;
+      proxy_connect_timeout  6000;
       proxy_http_version 1.1;
-      proxy_set_header Connection "";
+      proxy_set_header Upgrade $http_upgrade;
+      proxy_set_header Connection "Upgrade";
     }
 
     listen 443 ssl;
diff --git a/sample.env b/sample.env
index 9164e3a..5df5516 100644
--- a/sample.env
+++ b/sample.env
@@ -10,4 +10,5 @@ GONITO_AUTO_OPENING=false
 NGINX_CERTIFICATE_DIR=/home/user/certs
 GONITO_IS_PUBLIC=true
 GONITO_SSH_DIRECTORY=/home/user/.ssh
+GONITO_VIEWING_PROGRESS_STYLE=with-web-sockets
 JSON_WEB_KEY="{\"kty\":\"RSA\", \"alg\":\"RS256\", \"use\":\"sig\", \"kid\":\"h01jmt_bD-1Di8i_GYbEV2a4NxhptzySHO-R8VuNHVA\", \"e\":\"AQAB\", \"n\": \"qG1elE6KPW3BYMxNpgK73MoksvbrUSfpRY4z9hU5iMsJREyD5Ar6XpjM1xAr6G7xglnOoumPC9o6FqhDHihm6QdJ5s5MA9ZyGkbi--kvy9Qc2d_VIGU-UR4vwyk3hAwXOFLhoknpQrJBJmMQvGFdas1Yr-m9EIWwT1zN7neHZkRUYZSVyQw_XghtMIWAUsLnhr6mM7nstHLafgxe5Qamzuc4K5EC_qipFXu4ugYkMDnaknlhkT43m7tcduVDnv5GV_4dBesF7FRII8tgUQWyw3Ty_FIoq43SInUPU_9cxA-qPGQz5C50th2aJl1z1snpLWS_1Zfsa8lnFsMj8_oh6w\"}"