diff --git a/.gitignore b/.gitignore
index e65999f..11e5cb9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ test_data
 data
 light
 config.json
+*.mbtiles
diff --git a/package.json b/package.json
index 7e71853..1b32a3c 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,8 @@
     "nomnom": "1.8.1",
     "request": "2.74.0",
     "sharp": "0.15.1",
-    "sphericalmercator": "1.0.5"
+    "sphericalmercator": "1.0.5",
+    "tileserver-gl-styles": "0.1.0"
   },
   "devDependencies": {
     "should": "^10.0.0",
diff --git a/run.sh b/run.sh
index fc5e2cc..5f34649 100755
--- a/run.sh
+++ b/run.sh
@@ -1,11 +1,3 @@
 #!/bin/bash
-if [ ! -f /data/config.json ]; then
-  echo "INFO: No config.json found! Downloading sample data..."
-  echo "--------------------------------------------------------------------------------"
-  curl -L -o sample_data.zip https://github.com/klokantech/tileserver-gl-data/archive/v0.8.0.zip
-  unzip -q sample_data.zip -d sample_data
-  mv sample_data/tileserver-gl-data-*/* -t /data
-  rm sample_data.zip
-  rm -r sample_data
-fi
-xvfb-run -a -e /dev/stdout --server-args="-screen 0 1024x768x24" node /usr/src/app/src/main.js -p 80 -c /data/config.json
+cd /data
+xvfb-run -a -e /dev/stdout --server-args="-screen 0 1024x768x24" node /usr/src/app/ -p 80
diff --git a/src/main.js b/src/main.js
index 34df437..4e12742 100644
--- a/src/main.js
+++ b/src/main.js
@@ -2,7 +2,21 @@
 
 'use strict';
 
+var fs = require('fs'),
+    path = require('path'),
+    request = require('request');
+
+var mbtiles = require('mbtiles');
+
+var packageJson = require('../package');
+
 var opts = require('nomnom')
+  .option('mbtiles', {
+    default: undefined,
+    help: 'MBTiles file (uses demo configuration);\n' +
+          '\t    ignored if the configuration file is also specified',
+    position: 0
+  })
   .option('config', {
     abbr: 'c',
     default: 'config.json',
@@ -18,17 +32,129 @@ var opts = require('nomnom')
     default: 8080,
     help: 'Port'
   })
+  .option('verbose', {
+    abbr: 'V',
+    flag: true,
+    help: 'More verbose output'
+  })
   .option('version', {
     abbr: 'v',
     flag: true,
     help: 'Version info',
     callback: function() {
-      return 'version ' + require('../package.json').version;
+      return packageJson.name + ' v' + packageJson.version;
     }
   }).parse();
 
-return require('./server')({
-  config: opts.config,
-  bind: opts.bind,
-  port: opts.port
+
+console.log('Starting ' + packageJson.name + ' v' + packageJson.version);
+
+var startServer = function(configPath, config) {
+  return require('./server')({
+    configPath: configPath,
+    config: config,
+    bind: opts.bind,
+    port: opts.port
+  });
+};
+
+var startWithMBTiles = function(mbtilesFile) {
+  console.log('Automatically creating config file for ' + mbtilesFile);
+
+  mbtilesFile = path.resolve(process.cwd(), mbtilesFile);
+
+  var mbtilesStats = fs.statSync(mbtilesFile);
+  if (!mbtilesStats.isFile() || mbtilesStats.size === 0) {
+    console.log('ERROR: Not valid MBTiles file: ' + mbtilesFile);
+    process.exit(1);
+  }
+  var instance = new mbtiles(mbtilesFile, function(err) {
+    instance.getInfo(function(err, info) {
+      if (info.format != 'pbf') {
+        console.log('ERROR: MBTiles format is not "pbf".');
+        process.exit(1);
+      }
+      var bounds = info.bounds;
+
+      var styleDir = path.resolve(__dirname, "../node_modules/tileserver-gl-styles/");
+
+      var config = {
+        "options": {
+          "paths": {
+            "root": styleDir,
+            "fonts": "glyphs",
+            "sprites": "sprites",
+            "styles": "styles",
+            "mbtiles": path.dirname(mbtilesFile)
+          }
+        },
+        "styles": {},
+        "data": {
+          "data": {
+            "mbtiles": path.basename(mbtilesFile)
+          }
+        }
+      };
+
+      var styles = fs.readdirSync(path.resolve(styleDir, 'styles'));
+      for (var i=0; i < styles.length; i++) {
+        var styleFilename = styles[i];
+        if (styleFilename.endsWith('.json')) {
+          var styleObject = {
+            "style": path.basename(styleFilename),
+            "bounds": bounds
+          };
+          config['styles'][path.basename(styleFilename, '.json')] =
+              styleObject;
+        }
+      }
+
+      if (opts.verbose) {
+        console.log(JSON.stringify(config, undefined, 2));
+      } else {
+        console.log('Run with --verbose to see the config file here.');
+      }
+
+      return startServer(null, config);
+    });
+  });
+};
+
+fs.stat(path.resolve(opts.config), function(err, stats) {
+  if (err || !stats.isFile() || stats.size === 0) {
+    var mbtiles = opts.mbtiles;
+    if (!mbtiles) {
+      // try to find in the cwd
+      var files = fs.readdirSync(process.cwd());
+      for (var i=0; i < files.length; i++) {
+        var filename = files[i];
+        if (filename.endsWith('.mbtiles')) {
+          var mbTilesStats = fs.statSync(filename);
+          if (mbTilesStats.isFile() && mbTilesStats.size > 0) {
+            mbtiles = filename;
+            break;
+          }
+        }
+      }
+      if (mbtiles) {
+        console.log('No MBTiles specified, using ' + mbtiles);
+        return startWithMBTiles(mbtiles);
+      } else {
+        var url = 'https://osm2vectortiles-downloads.os.zhdk.cloud.switch.ch/v2.0/extracts/zurich_switzerland.mbtiles';
+        var filename = 'zurich_switzerland.mbtiles';
+        var stream = fs.createWriteStream(filename);
+        console.log('Downloading sample data (' + filename + ') from ' + url);
+        stream.on('finish', function() {
+          return startWithMBTiles(mbtiles);
+        });
+        return request.get(url).pipe(stream);
+      }
+    }
+    if (mbtiles) {
+      return startWithMBTiles(mbtiles);
+    }
+  } else {
+    console.log('Using specified config file from ' + opts.config);
+    return startServer(opts.config, null);
+  }
 });
diff --git a/src/serve_rendered.js b/src/serve_rendered.js
index 410d324..1400dc2 100644
--- a/src/serve_rendered.js
+++ b/src/serve_rendered.js
@@ -178,7 +178,6 @@ module.exports = function(options, repo, params, id, dataResolver) {
       if (fromData) {
         mbtilesFile = dataResolver(mbtilesFile);
       }
-      console.log(mbtilesFile);
 
       queue.push(function(callback) {
         mbtilesFile = path.resolve(options.paths.mbtiles, mbtilesFile);
diff --git a/src/server.js b/src/server.js
index 8e90eb0..1047db7 100644
--- a/src/server.js
+++ b/src/server.js
@@ -28,7 +28,7 @@ if (packageJson.name.slice(-6) !== '-light') {
 }
 
 module.exports = function(opts, callback) {
-  console.log('Starting ' + packageJson.name + ' v' + packageJson.version);
+  console.log('Starting server');
 
   var app = express().disable('x-powered-by'),
       serving = {
@@ -50,21 +50,29 @@ module.exports = function(opts, callback) {
     app.use(morgan('dev'));
   }
 
-  var configPath = path.resolve(opts.config);
-
-  var config;
-  try {
-    config = clone(require(configPath));
-  } catch (e) {
-    console.log('ERROR: Config file not found or invalid!');
-    console.log('       See README.md for instructions and sample data.');
+  var config = opts.config || null;
+  var configPath = null;
+  if (opts.configPath) {
+    configPath = path.resolve(opts.configPath);
+    try {
+      config = clone(require(configPath));
+    } catch (e) {
+      console.log('ERROR: Config file not found or invalid!');
+      console.log('       See README.md for instructions and sample data.');
+      process.exit(1);
+    }
+  }
+  if (!config) {
+    console.log('ERROR: No config file not specified!');
     process.exit(1);
   }
 
   var options = config.options || {};
   var paths = options.paths || {};
   options.paths = paths;
-  paths.root = path.resolve(process.cwd(), paths.root || '');
+  paths.root = path.resolve(
+    configPath ? path.dirname(configPath) : process.cwd(),
+    paths.root || '');
   paths.styles = path.resolve(paths.root, paths.styles || '');
   paths.fonts = path.resolve(paths.root, paths.fonts || '');
   paths.sprites = path.resolve(paths.root, paths.sprites || '');
@@ -83,11 +91,17 @@ module.exports = function(opts, callback) {
 
     if (item.serve_data !== false) {
       app.use('/styles/', serve_style(options, serving.styles, item, id,
-        function(mbtiles) {
+        function(mbtiles, fromData) {
           var dataItemId;
           Object.keys(data).forEach(function(id) {
-            if (data[id].mbtiles == mbtiles) {
-              dataItemId = id;
+            if (fromData) {
+              if (id == mbtiles) {
+                dataItemId = id;
+              }
+            } else {
+              if (data[id].mbtiles == mbtiles) {
+                dataItemId = id;
+              }
             }
           });
           if (dataItemId) { // mbtiles exist in the data config
@@ -107,7 +121,16 @@ module.exports = function(opts, callback) {
     if (item.serve_rendered !== false) {
       if (serve_rendered) {
         app.use('/styles/' + id + '/',
-                serve_rendered(options, serving.rendered, item, id));
+                serve_rendered(options, serving.rendered, item, id,
+        function(mbtiles) {
+          var mbtilesFile;
+          Object.keys(data).forEach(function(id) {
+            if (id == mbtiles) {
+              mbtilesFile = data[id].mbtiles;
+            }
+          });
+          return mbtilesFile;
+        }));
       } else {
         item.serve_rendered = false;
       }
diff --git a/test/setup.js b/test/setup.js
index 69a78f9..b752949 100644
--- a/test/setup.js
+++ b/test/setup.js
@@ -7,7 +7,7 @@ before(function() {
   console.log('global setup');
   process.chdir('test_data');
   var running = require('../src/server')({
-    config: 'config.json',
+    configPath: 'config.json',
     port: 8888
   });
   global.app = running.app;