BUILDING-PACKAGES: Mention that `pdns-builder` requires a working Docker local daemon

Co-authored-by: Peter van Dijk <peter.van.dijk@powerdns.com>

diff --git a/BUILDING-PACKAGES.md b/BUILDING-PACKAGES.md
index 7da089d8158f1b6ca056e0d9a6ad9f57d1fb5674..0df59bdd90c3405d3dfe54dccd824d6e093c6ad1 100644 (file)
--- a/BUILDING-PACKAGES.md
+++ b/BUILDING-PACKAGES.md
@@ -7,6 +7,8 @@ The [build-tags.yml](https://github.com/PowerDNS/pdns/blob/master/.github/workfl
 Building packages on your own computer
 --------------------------------------
 
+This requires a working Docker installation.
+
 1. Clone our git repo (`git clone https://github.com/PowerDNS/pdns.git`)
 2. Check out the version you want, it can be a git tag like dnsdist-1.8.1, a git commit ID or branch
 3. Update submodules (`git submodule update --init --recursive`)