doc: explain which tags to use for Docker

Well, it is not totally true yet.

diff --git a/README.md b/README.md
index 30173691866a80fe05171598d43ba0323f481964..b3ce85412ebe54df72334633fac0330733a51dd7 100644 (file)
--- a/README.md
+++ b/README.md
@@ -69,6 +69,10 @@ You can use Docker to run `lldpd`:
                --name lldpd \
                ghcr.io/lldpd/lldpd:latest
 
+In place of `latest` which provides you with the latest stable
+version, you may use `1`, `1.0`, `1.0.12` to match specific versions,
+or `master` to get the development version.
+
 To execute `lldpcli`, use:
 
     docker exec lldpd lldpcli show neighbors