added README.md

README.md

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+# Caddy Autoreload
+
+Auto reload extension, it watches externally generated certificates (like certbot) and reloads the Caddy when they change
+
+## How to use it
+
+There are two configuration you need to add into your Caddyfile: a global and per-site
+
+### global
+```
+{
+	auto_reload {
+		caddyfile /etc/caddy/Caddyfile
+		interval 8h
+	}
+
+	order auto_reload first
+}
+```
+
+### Per-Site
+```
+	auto_reload {
+		cert /etc/path/to/your/cert.pem
+	}
+```