Expand public installation and API documentation

examples/Caddyfile

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+{
+    # caddy-opnsense-blocker expects the default JSON access log format.
+    # If Caddy is itself behind another proxy, make sure request.client_ip
+    # contains the real client address before you feed logs to the blocker.
+}
+
+example.com {
+    log {
+        output file /var/log/caddy/public-web-access.json
+        format json
+    }
+
+    reverse_proxy 127.0.0.1:8080
+}
+
+git.example.com {
+    log {
+        output file /var/log/caddy/gitea-access.json
+        format json
+    }
+
+    reverse_proxy 127.0.0.1:3000
+}