Rename the config dir to setup

setup/templates/steps/expose.html

@@ -0,0 +1,33 @@
+{% call macros.panel("info", "Step 2 - expose Mailu to the world") %}
+<p>A mail server must be exposed to the world to receive emails, send emails,
+and let users access their mailboxes. Mailu has some flexibility in the way
+you expose it to the world.</p>
+
+<p>Among Mailu services, the <em>front</em> server is the one accepting connections,
+be it directly from the outside world, through a reverse proxy or in any
+complex configuration that you might want to setup. It needs to listen on some
+IP addresses in order to expose its public services. You must at least setup
+an IPv4 or an IPv6 address if you wish to access Mailu.</p>
+
+<p><span class="label label-warning">Warning</span> You must use specific addresses, please
+avoid generic all-interfaces addresses like <code>0.0.0.0</code> or <code>::</code>.</p>
+
+<div class="form-group">
+  <label>IPv4 listen address</label>
+  <input class="form-control" type="text" name="ip4" placeholder="1.2.3.4">
+</div>
+
+<div class="form-group">
+  <label>IPv6 listen address</label>
+  <input class="form-control" type="text" name="ip6" placeholder="2001:be4:1234::1">
+</div>
+
+<p>You server will be available under a main hostname but may expose multiple public
+hostnames. Every e-mail domain that points to this server must have one of the
+hostnames in its <code>MX</code> record. Hostnames must be coma-separated.</p>
+
+<div class="form-group">
+  <label>Public hostnames</label>
+  <input class="form-control" type="text" name="hostnames" placeholder="my.host.name,other.host.name" multiple>
+</div>
+{% endcall %}