Add HAL module structure for deployment as CDN service

Enables deploying f1-circuits as a HAL module on ace behind Traefik,
serving track SVGs at f1-circuits.zurag.be.

module.yml

@@ -0,0 +1,14 @@
+manifest: 2
+name: f1-circuits
+version: "1.0.0"
+description: "F1 track layout CDN — serves SVG/PNG circuit maps by grand prix and year"
+
+env:
+  DOMAIN:
+    from: node.domain
+    default: localhost
+
+docker:
+  - image: f1-circuits
+    context: .
+    dockerfile: service/Dockerfile