docs(readme): reference Qnap setup guide, fix #708

README.md

@@ -84,7 +84,7 @@ Program to keep DNS A and/or AAAA records updated for multiple DNS providers
 
 - Send notifications with [**Shoutrrr**](https://containrrr.dev/shoutrrr/v0.8/services/overview/) using `SHOUTRRR_ADDRESSES`
 - Container (Docker/K8s) specific features:
-  - Lightweight 15MB Docker image based on the Scratch Docker image
+  - Lightweight 12MB Docker image based on the Scratch Docker image
   - Docker healthcheck verifying the DNS resolution of your domains
   - Images compatible with `amd64`, `386`, `arm64`, `armv7`, `armv6`, `s390x`, `ppc64le`, `riscv64` CPU architectures
 - Persistence with a JSON file *updates.json* to store old IP addresses with change times for each record
@@ -118,6 +118,8 @@ Program to keep DNS A and/or AAAA records updated for multiple DNS providers
 
 ### Container
 
+[➡️ Qnap guide by @Araminta](https://github.com/qdm12/ddns-updater/issues/708)
+
 1. Create a directory of your choice, say *data* with a file named **config.json** inside:
 
     ```sh