Add support for Let's Encrypt via ssl engine.
diff --git a/README.rst b/README.rst
index 108e558..a619b27 100644
--- a/README.rst
+++ b/README.rst
@@ -153,6 +153,29 @@
               name: gitlab.domain.com
               port: 80
 
+Let's Encrypt
+
+.. code-block:: yaml
+
+    nginx:
+      server:
+        enabled: true
+        bind:
+          address: '0.0.0.0'
+          ports:
+          - 443
+        site:
+          gitlab_domain:
+            enabled: true
+            type: gitlab
+            name: domain
+            ssl:
+              enabled: true
+              engine: letsencrypt
+            host:
+              name: gitlab.domain.com
+              port: 443
+
 Read more
 =========
 
diff --git a/nginx/files/_ssl.conf b/nginx/files/_ssl.conf
index 2288c3f..4cc0938 100644
--- a/nginx/files/_ssl.conf
+++ b/nginx/files/_ssl.conf
@@ -4,8 +4,14 @@
   ssl on;
   ssl_session_cache shared:SSL:10m;
   ssl_session_timeout  10m;
-  ssl_certificate /etc/ssl/certs/{{ site.host.name }}-with-chain.crt;
+  {%- if site.ssl.engine is not defined %}
   ssl_certificate_key /etc/ssl/private/{{ site.host.name }}.key;
+  ssl_certificate /etc/ssl/certs/{{ site.host.name }}-with-chain.crt;
+  {%- elif site.ssl.engine == 'letsencrypt' %}
+  ssl_certificate         /etc/letsencrypt/live/{{ site.host.name }}/fullchain.pem;
+  ssl_certificate_key     /etc/letsencrypt/live/{{ site.host.name }}/privkey.pem;
+  ssl_trusted_certificate /etc/letsencrypt/live/{{ site.host.name }}/fullchain.pem;
+  {%- endif %}
   {%- set ssl_mode = site.ssl.get('mode', 'secure') %}
   {%- include "nginx/files/_ssl_"+ssl_mode+".conf" %}
   {%- endif %}
diff --git a/nginx/server/sites.sls b/nginx/server/sites.sls
index 250c92a..eb54dbc 100644
--- a/nginx/server/sites.sls
+++ b/nginx/server/sites.sls
@@ -5,6 +5,8 @@
 
 {% if site.ssl is defined and site.ssl.enabled %}
 
+{%- if site.ssl.engine is not defined %}
+
 {{ site.host.name }}_public_cert_{{ loop.index }}:
   file.managed:
   - name: /etc/ssl/certs/{{ site.host.name }}.crt
@@ -50,6 +52,8 @@
   - watch_in:
     - service: nginx_service
 
+{%- endif %}
+
 {% endif %}
 
 /etc/nginx/sites-available/{{ site.type }}_{{ site.name }}.conf: