Add basic caddy role

roles/caddy/templates/etc/caddy/Caddyfile.j2

@@ -0,0 +1,29 @@
+# Global options
+{
+    email {{ caddy_email }}
+}
+
+# Common security response headers
+(security-headers) {
+    header {
+        # disable Google FLoC tracking
+        Permissions-Policy interest-cohort=()
+
+        # enable HSTS
+        Strict-Transport-Security max-age=31536000
+
+        # disable clients from sniffing the media type
+        X-Content-Type-Options nosniff
+
+        # clickjacking protection: refuse to allow rendering this page
+        # in a frame, iframe, etc.
+        X-Frame-Options DENY
+
+        # keep referrer data off of HTTP connections
+        Referrer-Policy no-referrer-when-downgrade
+    }
+}
+
+# Import additional caddy config files in /etc/caddy/conf.d/
+# Note: these are imported in lexical sort order!
+import /etc/caddy/conf.d/*

roles/caddy/templates/etc/caddy/conf.d/vhost.j2

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+{{ ansible_managed | comment }}
+
+{# helper variables and per-site defaults that we can't set in role defaults #}
+{% set domain_name    = item.domain_name %}
+{% set domain_aliases = item.domain_aliases | default("") %}
+{# assume optional features are off unless a vhost explicitly sets them #}
+{% set has_wordpress  = item.has_wordpress | default(false) %}
+{% set needs_php      = item.needs_php | default(false) %}
+{% set has_gitea      = item.has_gitea | default(false) %}
+
+{{ domain_name }} {
+    {% if has_gitea %}
+    reverse_proxy :3000
+    {% endif %}
+
+    import security-headers
+}