Update docker image name in docker installation (#1889)

docs/content/documentation/getting-started/installation.md

@@ -110,7 +110,7 @@ You can now browse http://localhost:8080.
 
 > To enable live browser reload, you may have to bind to port 1024. Zola searches for an open
 > port between 1024 and 9000 for live reload. The new docker command would be
-> `$ docker run -u "$(id -u):$(id -g)" -v $PWD:/app --workdir /app -p 8080:8080 -p 1024:1024 balthek/zola:0.14.0 serve --interface 0.0.0.0 --port 8080 --base-url localhost`
+> `$ docker run -u "$(id -u):$(id -g)" -v $PWD:/app --workdir /app -p 8080:8080 -p 1024:1024 ghcr.io/getzola/zola:v0.15.1 serve --interface 0.0.0.0 --port 8080 --base-url localhost`
 
 ## Windows