roles/nginx: Add support for gitea

gitea hosts are basically webservers, but we need to proxy pass. I
am setting up gitea itself manually for now.

roles/nginx/templates/gitea.j2

@@ -0,0 +1,5 @@
+
+    location / {
+        proxy_pass http://localhost:3000;
+    }
+

roles/nginx/templates/vhost.conf.j2

@@ -7,6 +7,7 @@
 {% set enable_hsts    = item.enable_hsts | default(False) %}
 {% set has_wordpress  = item.has_wordpress | default(False) %}
 {% set needs_php      = item.needs_php | default(False) %}
+{% set has_gitea      = item.has_gitea | default(False) %}
 
 # http -> https vhost
 server {
@@ -49,6 +50,10 @@ server {
         {% include 'wordpress.j2' %}
     {% endif %}
 
+    {% if has_gitea == True %}
+        {% include 'gitea.j2' %}
+    {% endif %}
+
     error_page 500 502 503 504 /50x.html;
     location = /50x.html {
         root /usr/share/nginx/html;