otter: add web config

hosts.ini

@@ -47,3 +47,6 @@
 
 [actual]
 192.168.0.3 static_ip=192.168.0.3
+
+[otter]
+192.168.0.2 static_ip=192.168.0.2

roles/otter-web/meta/main.yml

@@ -0,0 +1,3 @@
+---
+dependencies:
+  - role: caddy

roles/otter-web/tasks/main.yml

@@ -0,0 +1,9 @@
+---
+- name: Ensure Caddyfile is present
+  template:
+    src: 'otter.Caddyfile.j2'
+    dest: '/etc/caddy/otter.Caddyfile'
+    owner: root
+    group: root
+    mode: '0644'
+  notify: caddy-reload

roles/otter-web/templates/otter.Caddyfile.j2

@@ -0,0 +1,3 @@
+otter.roosens.me {
+    reverse_proxy {{ hostvars[groups['otter'][0]].static_ip }}:8017
+}