Improve documentation.

README.md

@@ -1,3 +1,30 @@
 # Is de FooBar open?
 
 Source code for the unofficial FooBar website.
+
+## Building
+
+This project requires both `composer` and `yarn` (`npm` might work as a
+replacement) to build. 
+
+```bash
+composer update --no-dev
+yarn
+yarn run webpack --mode production
+```
+
+This will download all dependencies and compile javascript as needed.
+
+## Installation
+
+After building, you can install the project on your web server by copying
+everything (except for the `node_modules`) to your server. The document root
+should be `public`.
+
+## Configuration
+
+The website will attempt to load configuration from `config/config.php` and
+if that doesn't work, from `config/config.sample.php`. You can create your own
+configuration by copying the sample and changing parameters as needed.
+
+The sample configuration also contains details on the particular options.

config/config.sample.php

@@ -2,14 +2,23 @@
 
 return [
     /**
-     * The security works by checking if the request is made from an authorized IP-address.
+     * The security works by checking if the request is made from an
+     * authorized IP-address.
      *
-     * The address is configured as an IP-address and a subnet mask. In order to verify the entire IP-address, specify
-     * 32 for the mask. This option only supports IPv4 for obvious reasons.
+     * The address is configured as an IP-address and a subnet mask. In
+     * order to verify the entire IP-address, specify 32 for the mask.
+     * This option only supports IPv4 for reasons.
      */
     'security'   => [
         'mask'    => 8,
         'address' => '127.0.0.1',
     ],
+    /**
+     * The state file is used for tracking whether the bar is open.
+     *
+     * If the file exists, the bar is considered to be open. The user
+     * running PHP must have write access to the directory this file
+     * is in.
+     */
     'state_file' => __DIR__ . '/open.flag',
 ];