Move container registry to docker.dcglab.co.uk/kb

registry.dcglab.co.uk has been decommissioned and replaced by
docker.dcglab.co.uk. Images move off the Gitea built-in registry (which
never successfully accepted a push) to the new host, published at the
root with no org segment: docker.dcglab.co.uk/kb/engine and .../kb/mcp.

IMAGE_ORG is now empty by default but still honoured when set, so the
documented REGISTRY=ghcr.io IMAGE_ORG=myorg override keeps working.

Gitea remains the git forge — the release download URLs in README.md are
unchanged and still point at gitea.dcglab.co.uk.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

DEVELOPER.md

@@ -90,7 +90,7 @@ curl http://localhost:8000/api/v1/status | jq .version
 
 ### Docker images
 
-Images are pushed to `gitea.dcglab.co.uk/steve/kb/engine` with tags:
+Images are pushed to `docker.dcglab.co.uk/kb/engine` with tags:
 
 - `engine-v2.0.6-nvidia` / `engine-v2.0.6-cpu` — versioned
 - `latest-nvidia` / `latest-cpu` — latest release

MCP.md

@@ -20,7 +20,7 @@ docker run -d --name kb-mcp \
   -e KB_API_KEY=your-engine-key \
   -e KB_MCP_API_KEY=your-agent-key \
   --restart unless-stopped \
-  gitea.dcglab.co.uk/steve/kb/mcp:latest
+  docker.dcglab.co.uk/kb/mcp:latest
 ```
 
 ## MCP tools

README.md

@@ -33,7 +33,7 @@ docker run -d --name kb-engine \
   -e KB_DEVICE=auto \
   -e KB_API_KEY=your-secret-key \
   --restart unless-stopped \
-  gitea.dcglab.co.uk/steve/kb/engine:latest-nvidia
+  docker.dcglab.co.uk/kb/engine:latest-nvidia
 
 # CPU only (no GPU required — smaller image)
 docker run -d --name kb-engine \
@@ -42,7 +42,7 @@ docker run -d --name kb-engine \
   -e KB_MODEL=all-MiniLM-L6-v2 \
   -e KB_API_KEY=your-secret-key \
   --restart unless-stopped \
-  gitea.dcglab.co.uk/steve/kb/engine:latest-cpu
+  docker.dcglab.co.uk/kb/engine:latest-cpu
 ```
 
 Or use a compose file from the repo:

openspec/specs/docker-deployment/spec.md

@@ -65,7 +65,7 @@ The project SHALL provide Docker Compose files for single-command deployment. Co
 
 #### Scenario: Pre-built image deployment
 - **WHEN** an admin wants to use a pre-built engine image without building from source
-- **THEN** the engine release notes SHALL include the exact `docker pull` command with the versioned tag (e.g. `gitea.dcglab.co.uk/steve/kb/engine:engine-v2.1.0-nvidia`)
+- **THEN** the engine release notes SHALL include the exact `docker pull` command with the versioned tag (e.g. `docker.dcglab.co.uk/kb/engine:engine-v2.1.0-nvidia`)
 
 #### Scenario: MCP allowed hosts in Compose
 - **WHEN** the kb-mcp service is defined in a Compose file

release-engine.sh

@@ -15,9 +15,9 @@ ENGINE_DIR="$SCRIPT_DIR/engine"
 VERSION_FILE="$ENGINE_DIR/VERSION"
 
 # Container registry
-REGISTRY="${REGISTRY:-gitea.dcglab.co.uk}"
+REGISTRY="${REGISTRY:-docker.dcglab.co.uk}"
-IMAGE_ORG="${IMAGE_ORG:-steve}"
+IMAGE_ORG="${IMAGE_ORG:-}"
-IMAGE_BASE="${REGISTRY}/${IMAGE_ORG}/kb"
+IMAGE_BASE="${REGISTRY}${IMAGE_ORG:+/${IMAGE_ORG}}/kb"
 
 #──────────────────────────────────────────────────────────────────────
 # Parse args