diff --git a/bin/gritty.js b/bin/gritty.js
index e923242..b065437 100755
--- a/bin/gritty.js
+++ b/bin/gritty.js
@@ -2,6 +2,25 @@
 
 'use strict';
 
+/**
+ * @typedef {{
+ *     "name": string,
+ *     "format": string,
+*      "path": string
+ * }} FontData
+ * 
+ * @typedef {{
+ *     "auto-restart": string,
+ *     "port": number,
+ *     "command": string,
+ *     "base-path": string,
+ *     "font-family": string,
+ *     "external-fonts": FontData[]
+ * }} Config
+ */
+
+const fs = require('fs');
+
 const args = require('yargs-parser')(process.argv.slice(2), {
     boolean: [
         'version',
@@ -14,6 +33,7 @@ const args = require('yargs-parser')(process.argv.slice(2), {
     ],
     string: [
         'command',
+        'config-path'
     ],
     alias: {
         help: 'h',
@@ -39,11 +59,41 @@ function main(args) {
     if (args.path)
         return path();
     
-    start({
-        port: args.port,
-        command: args.command,
-        autoRestart: args.autoRestart,
-    });
+
+    if (args.configPath) {
+        /**
+         * @type {Config}
+         */
+        let config = null;
+
+        try {
+            config = loadConfigFile(args.configPath);
+        } catch (e) {
+            console.log(e);
+            console.log('exit');
+            return;
+        }
+        
+        if (config['external-fonts'].length > 0) {
+            generateExternalFontStylesheet(config['external-fonts']);
+        }
+
+        console.log(config);
+
+        start({
+            port: config.port,
+            command: config.command,
+            basePath: config['base-path'],
+            autoRestart: config['auto-restart'],
+            fontFamily: config['font-family']
+        });
+    } else {
+        start({
+            port: args.port,
+            command: args.command,
+            autoRestart: args.autoRestart,
+        });
+    }
 }
 
 function path() {
@@ -57,7 +107,9 @@ function start(options) {
     const {
         port,
         command,
+        basePath,
         autoRestart,
+        fontFamily
     } = options;
     
     check(port);
@@ -76,20 +128,24 @@ function start(options) {
     const ip = process.env.IP || /* c9 */
               '0.0.0.0';
     
-    app.use(gritty())
-        .use(express.static(DIR));
+    app.use(`${basePath}`, gritty())
+        .use(`${basePath}`, express.static(DIR));
     
-    const socket = io(server);
+    const socket = io(server, {
+        path: `${basePath}/socket.io`
+    });
     
     gritty.listen(socket, {
         command,
+        basePath,
         autoRestart,
+        fontFamily
     });
     
     server.listen(port, ip)
         .on('error', squad(exit, getMessage));
     
-    console.log(`url: http://localhost:${port}`);
+    console.log(`url: http://localhost:${port}/${basePath}`);
 }
 
 function help() {
@@ -119,3 +175,73 @@ function exit(msg) {
     process.exit(-1);
 }
 
+/**
+ * @param path {string} config path
+ * @returns {}
+ */
+function loadConfigFile(path) {
+    /**
+     * @type {Config}
+     */
+    let config = null;
+
+    try {
+        let fileContent = fs.readFileSync(path, {
+            encoding: 'utf-8',
+            flag: 'r'
+        });
+
+        config = JSON.parse(fileContent);
+    } catch (e) {
+        console.log(e);
+        throw new Error('Cannot parse config file.');
+    }
+
+    return config;
+}
+
+/**
+ * 
+ * @param {FontData[]} fontDataList 
+ */
+function generateExternalFontStylesheet(fontDataList) {
+    const path = require('path');
+    const cssDir = path.resolve('./css');
+    const fontsDir = path.resolve('./fonts');
+    const fileName = 'external-font.css';
+
+    let getFontFaceStatement = (name, path, format) => {
+        return (
+            `@font-face {\n` +
+            `   font-family: '${name}';\n` + 
+            `   src: url('${path}') format('${format}');\n` + 
+            `}\n\n`);
+    };
+
+    if (fs.existsSync(cssDir) && fs.lstatSync(cssDir).isDirectory()) {
+        if (fs.existsSync(fontsDir)) {
+            if (!fs.lstatSync(fontsDir).isDirectory()) {
+                throw new Error('Cannot copy font file.');
+            }
+        } else {
+            fs.mkdirSync(fontsDir);
+        }
+
+        let content = '';
+
+        for (let data of fontDataList) {
+            let resolvedPath = path.join(data.path);
+            if (fs.existsSync(resolvedPath)) {
+                fs.copyFileSync(resolvedPath, path.join(fontsDir, path.basename(resolvedPath)), )
+                content += getFontFaceStatement(data.name, `../fonts/${path.basename(resolvedPath)}`, data.format);
+                fs.writeFileSync(path.resolve('./', cssDir, fileName), content);
+            } else {
+                console.warn(`Warning: Cannot found font file: ${resolvedPath}`);
+            }
+        }
+    } else {
+        throw new Error('Cannot make "external-font.css".');
+    }
+
+}
+
diff --git a/client/gritty.js b/client/gritty.js
index 7530baf..f08dfed 100644
--- a/client/gritty.js
+++ b/client/gritty.js
@@ -38,7 +38,7 @@ function gritty(element, options = {}) {
     const el = getEl(element);
     
     const {
-        socketPath = '',
+        socketPath = location.pathname,
         fontFamily = defaultFontFamily,
         prefix = '/gritty',
         command,
@@ -66,17 +66,21 @@ function createTerminal(terminalContainer, {env, cwd, command, autoRestart, sock
         scrollback: 1000,
         tabStopWidth: 4,
         fontFamily,
+        rendererType: 'dom'
     });
     
     terminal.open(terminalContainer);
     terminal.focus();
     
-    terminal.loadAddon(webglAddon);
+    //terminal.loadAddon(webglAddon);
     terminal.loadAddon(fitAddon);
     fitAddon.fit();
     
     terminal.onResize(onTermResize(socket));
     terminal.onData(onTermData(socket));
+    terminal.onRender((a, b) => {
+        terminal._addonManager._addons[0].instance.fit();
+    });
     
     window.addEventListener('resize', onWindowResize(fitAddon));
     
@@ -85,6 +89,11 @@ function createTerminal(terminalContainer, {env, cwd, command, autoRestart, sock
     socket.on('accept', onConnect(socket, fitAddon, {env, cwd, cols, rows, command, autoRestart}));
     socket.on('disconnect', onDisconnect(terminal));
     socket.on('data', onData(terminal));
+    socket.on('set-font', data => {
+        terminal.setOption('fontFamily', data.fontFamily);
+    });
+
+    window.t = terminal;
     
     return {
         socket,
@@ -125,7 +134,7 @@ function connect(prefix, socketPath) {
     const href = getHost();
     const FIVE_SECONDS = 5000;
     
-    const path = socketPath + '/socket.io';
+    const path = socketPath + 'socket.io';
     const socket = io.connect(href + prefix, {
         'max reconnection attempts': 2 ** 32,
         'reconnection limit': FIVE_SECONDS,
diff --git a/config.json b/config.json
new file mode 100644
index 0000000..7635b8c
--- /dev/null
+++ b/config.json
@@ -0,0 +1,14 @@
+{
+    "auto-restart": true,
+    "port": 8082,
+    "command": "zsh",
+    "base-path": "/base-path",
+    "font-family": "Hack",
+    "external-fonts": [
+        {
+            "name": "Hack",
+            "format": "truetype",
+            "path": "/some/path/Hack/Hack-Regular.ttf"
+        }
+    ]
+}
diff --git a/index.html b/index.html
index 2b0c1bb..9ee30da 100644
--- a/index.html
+++ b/index.html
@@ -3,11 +3,12 @@
     <head>
         <title>Gritty</title>
         
-        <link rel="stylesheet" href="/css/style.css">
+        <link rel="stylesheet" href="./css/style.css">
+        <link rel="stylesheet" href="./css/external-font.css">
     </head>
     <body>
         <div class="gritty"></div>
-        <script src="/gritty/gritty.js"></script>
+        <script src="./gritty/gritty.js"></script>
         <script>
             /* global gritty */
             gritty('.gritty');
diff --git a/server/gritty.js b/server/gritty.js
index dda9fba..05d27e8 100644
--- a/server/gritty.js
+++ b/server/gritty.js
@@ -74,7 +74,7 @@ function createTerminal({command, env, cwd, cols, rows}) {
         name: 'xterm-color',
         cols,
         rows,
-        cwd,
+        cwd: process.env['HOME'],
         env: {
             ...process.env,
             ...env,
@@ -194,6 +194,10 @@ function connection(options, socket) {
         socket.on('data', onData);
         socket.on('resize', onResize);
         socket.on('disconnect', onDisconnect);
+
+        if (options.fontFamily) {
+            socket.emit('set-font', { fontFamily: options.fontFamily });
+        }
     }
 }