Drop the docker login step: the images are now served anonymously

README.md

@@ -18,7 +18,8 @@ USB stick — `bash install-antserver-2.37.sh`.
 
 ## Before you start
 
-**Docker must be installed and running.**
+**Docker must be installed and running.** That is the only prerequisite — no
+account, no sign-in, no token.
 
 - macOS — [Docker Desktop](https://www.docker.com/products/docker-desktop). It
   must be running before you install, every time — it does not start itself
@@ -50,3 +51,20 @@ curl -fsSLO https://git.djdadi.com/bav/ant-install/releases/download/v2.37/insta
 sha256sum -c install-antserver-2.37.sh.sha256
 ```
 
+## If it does not start
+
+- **"docker not found"** or **"the Docker daemon is not responding"** — Docker
+  is not installed, or is not running. See above.
+- **"could not download the bundle"** — this machine cannot reach
+  `git.djdadi.com`. Check the network, and the VPN if one is needed.
+- **"still not ready after 5 minutes"** — Docker Desktop needs more memory.
+  Settings → Resources → at least 6 GB; the server alone asks for 4 GB.
+
+## A note on distribution
+
+The ANT server software is confidential and licensed from BlueBotics. These
+images are currently served without authentication for short-term internal
+use — please do not circulate the URL outside the organisation.
+
+Windows is not covered here; ask for the zip bundle, which has double-click
+entry points instead.