diff --git a/package-lock.json b/package-lock.json
index 940876f..dda5d03 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,7 @@
       "license": "ISC",
       "dependencies": {
         "express": "^4.16.3",
+        "fs-extra": "^9.0.1",
         "multer": "^1.3.0",
         "node-docker-api": "^1.1.22",
         "socket.io": "^3.0.4",
@@ -67,6 +68,14 @@
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
     },
+    "node_modules/at-least-node": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/at-least-node/-/at-least-node-1.0.0.tgz",
+      "integrity": "sha512-+q/t7Ekv1EDY2l6Gda6LLiX14rU9TV20Wa3ofeQmwPFZbOMo9DXrLbOjFaaclkXKWidIaopwAObQDqwWtGUjqg==",
+      "engines": {
+        "node": ">= 4.0.0"
+      }
+    },
     "node_modules/base64-arraybuffer": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.4.tgz",
@@ -434,6 +443,25 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/fs-extra": {
+      "version": "9.0.1",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-9.0.1.tgz",
+      "integrity": "sha512-h2iAoN838FqAFJY2/qVpzFXy+EBxfVE220PalAqQLDVsFOHLJrZvut5puAbCdNv6WJk+B8ihI+k0c7JK5erwqQ==",
+      "dependencies": {
+        "at-least-node": "^1.0.0",
+        "graceful-fs": "^4.2.0",
+        "jsonfile": "^6.0.1",
+        "universalify": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/graceful-fs": {
+      "version": "4.2.4",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
+      "integrity": "sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw=="
+    },
     "node_modules/http-errors": {
       "version": "1.6.3",
       "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.6.3.tgz",
@@ -474,6 +502,26 @@
       "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
       "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8="
     },
+    "node_modules/jsonfile": {
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-6.1.0.tgz",
+      "integrity": "sha512-5dgndWOriYSm5cnYaJNhalLNDKOqFwyDB/rr1E9ZsGciGvKPs8R2xYGCacuf3z6K1YKDz182fd+fY3cn3pMqXQ==",
+      "dependencies": {
+        "graceful-fs": "^4.1.6",
+        "universalify": "^2.0.0"
+      },
+      "optionalDependencies": {
+        "graceful-fs": "^4.1.6"
+      }
+    },
+    "node_modules/jsonfile/node_modules/universalify": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.0.tgz",
+      "integrity": "sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ==",
+      "engines": {
+        "node": ">= 10.0.0"
+      }
+    },
     "node_modules/jsonparse": {
       "version": "0.0.5",
       "resolved": "https://registry.npmjs.org/jsonparse/-/jsonparse-0.0.5.tgz",
@@ -895,6 +943,14 @@
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c="
     },
+    "node_modules/universalify": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-1.0.0.tgz",
+      "integrity": "sha512-rb6X1W158d7pRQBg5gkR8uPaSfiids68LTJQYOtEUhoJUWBdaQHsuT/EUduxXYxcrt4r5PJ4fuHW1MHT6p0qug==",
+      "engines": {
+        "node": ">= 10.0.0"
+      }
+    },
     "node_modules/unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
@@ -994,6 +1050,11 @@
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
     },
+    "at-least-node": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/at-least-node/-/at-least-node-1.0.0.tgz",
+      "integrity": "sha512-+q/t7Ekv1EDY2l6Gda6LLiX14rU9TV20Wa3ofeQmwPFZbOMo9DXrLbOjFaaclkXKWidIaopwAObQDqwWtGUjqg=="
+    },
     "base64-arraybuffer": {
       "version": "0.1.4",
       "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.1.4.tgz",
@@ -1300,6 +1361,22 @@
       "resolved": "https://registry.npmjs.org/fresh/-/fresh-0.5.2.tgz",
       "integrity": "sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac="
     },
+    "fs-extra": {
+      "version": "9.0.1",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-9.0.1.tgz",
+      "integrity": "sha512-h2iAoN838FqAFJY2/qVpzFXy+EBxfVE220PalAqQLDVsFOHLJrZvut5puAbCdNv6WJk+B8ihI+k0c7JK5erwqQ==",
+      "requires": {
+        "at-least-node": "^1.0.0",
+        "graceful-fs": "^4.2.0",
+        "jsonfile": "^6.0.1",
+        "universalify": "^1.0.0"
+      }
+    },
+    "graceful-fs": {
+      "version": "4.2.4",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.2.4.tgz",
+      "integrity": "sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw=="
+    },
     "http-errors": {
       "version": "1.6.3",
       "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-1.6.3.tgz",
@@ -1331,6 +1408,22 @@
       "resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
       "integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8="
     },
+    "jsonfile": {
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-6.1.0.tgz",
+      "integrity": "sha512-5dgndWOriYSm5cnYaJNhalLNDKOqFwyDB/rr1E9ZsGciGvKPs8R2xYGCacuf3z6K1YKDz182fd+fY3cn3pMqXQ==",
+      "requires": {
+        "graceful-fs": "^4.1.6",
+        "universalify": "^2.0.0"
+      },
+      "dependencies": {
+        "universalify": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.0.tgz",
+          "integrity": "sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ=="
+        }
+      }
+    },
     "jsonparse": {
       "version": "0.0.5",
       "resolved": "https://registry.npmjs.org/jsonparse/-/jsonparse-0.0.5.tgz",
@@ -1671,6 +1764,11 @@
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c="
     },
+    "universalify": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-1.0.0.tgz",
+      "integrity": "sha512-rb6X1W158d7pRQBg5gkR8uPaSfiids68LTJQYOtEUhoJUWBdaQHsuT/EUduxXYxcrt4r5PJ4fuHW1MHT6p0qug=="
+    },
     "unpipe": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
diff --git a/package.json b/package.json
index 69ca624..b9b7224 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
   "license": "ISC",
   "dependencies": {
     "express": "^4.16.3",
+    "fs-extra": "^9.0.1",
     "multer": "^1.3.0",
     "node-docker-api": "^1.1.22",
     "socket.io": "^3.0.4",
diff --git a/resources/js/script.js b/resources/js/script.js
index 6b39872..429b48d 100644
--- a/resources/js/script.js
+++ b/resources/js/script.js
@@ -179,10 +179,12 @@ $( document ).ready( () => {
     });
 
     // Submit results
-    $("#btnSubmit").click((event) => {
+    $("#btnSubmit").click(function(event) {
         // stop submit the form, we will post it manually.
         event.preventDefault();
 
+        socket.emit('option', user_option);
+
         // Hide submit
         $('#ulysses16_submit').prop('disabled', true);
         $('#att48_submit').prop('disabled', true);
diff --git a/server.js b/server.js
index a4a005e..384a1df 100644
--- a/server.js
+++ b/server.js
@@ -1,4 +1,6 @@
 const fs = require('fs')
+const fsExtra = require('fs-extra')
+
 const { v4: uuidv4 } = require('uuid');
 
 const MAX_LEADERBOARD = 20
@@ -192,13 +194,15 @@ var docker_build = (socket, sessionID, option) => {
         options += " -d "
 
     check_time = 0
-    console.log('[server][start]', sessionID)
+    console.log('[server][start]', sessionID, options)
     socket.emit('start')
 
     fs.mkdir(current_path + '/output/' + sessionID.toString(), () => {
         socket.emit('info', 'Output directort created.')
         socket.emit('info', 'Test started, this may take a while.')
     })
+    
+    fsExtra.emptyDirSync(current_path + '/output/' + sessionID.toString())
 
     docker.container.create({
         Image: 'com2014-tsp',