Fix up docker

Dockerfile

@@ -1,4 +1,10 @@
+# Minimal static web container for Relibre; Caddy runs separately as a reverse proxy.
 FROM nginx:alpine
-COPY proxy/nginx-site.conf /etc/nginx/conf.d/default.conf
+
+# Serve the repo root (index.html, ui/, images/, etc.)
 COPY . /usr/share/nginx/html
-HEALTHCHECK --interval=30s --timeout=3s --retries=3 CMD wget -qO- http://localhost/ > /dev/null || exit 1
+
+# Basic healthcheck
+HEALTHCHECK --interval=30s --timeout=3s --retries=3 CMD \
+  wget -qO- http://localhost/ > /dev/null || exit 1
+