Hub runtime: allocate port 8788, add Go skeleton and Docker deployment

Co-Authored-By: Paperclip <noreply@paperclip.ing>

docs/outline/03-code-map.md

@@ -1,7 +1,7 @@
 # Central AI Hub — Code Structure Map
 
 > **Writing Style**: ASD-STE100 Simplified Technical English (`ste-writing`).
-> **Status**: Planned. The Hub is not built yet.
+> **Status**: Skeleton built (AUD-48). Routing (AUD-49) is not built yet.
 
 ## Planned Folder Layout
 
@@ -10,6 +10,9 @@ central_ai_llm_master/
   AGENTS.md                 project rules for agents
   hub_brief.md              agreed design (source of truth)
   README.md                 technical readme
+  Dockerfile                multi-stage build (static binary, distroless)
+  docker-compose.yml        one container, port 8788
+  .dockerignore             build context filter
   docs/
     hub-architecture.mmd    Mermaid source
     hub-architecture-map.html  Archify map
@@ -19,8 +22,9 @@ central_ai_llm_master/
     ask-contract.md         Hub to project interface
     hub-api.md              frozen inbound API (v1)
     vikunja-tasks.json      human task list
-  src/                      Hub service code (to build)
-    main.go                 HTTP entry point
+  src/                      Hub service code
+    go.mod                  module hub
+    main.go                 HTTP entry point (GET /health)
     hear/                   takes voice or text
     understand/             LLM intent routing
     check/                  authorization and approval