fix: IndeedHub demo builds via git clone in Dockerfile

No submodule needed — the Dockerfile clones the IndeedHub repo
directly during build. Works with Portainer without any manual steps.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

indeedhub-demo/Dockerfile

@@ -0,0 +1,19 @@
+# IndeedHub demo — clone, build, and serve in one step
+# No submodule or local source needed
+FROM node:20-alpine AS builder
+RUN apk add --no-cache git
+WORKDIR /app
+RUN git clone --depth 1 https://git.tx1138.com/lfg2025/indeehub.git .
+RUN npm ci
+ENV VITE_USE_MOCK_DATA=false
+ENV VITE_INDEEHUB_API_URL=/api
+ENV VITE_INDEEHUB_CDN_URL=/storage
+ENV VITE_NOSTR_RELAYS=""
+RUN npm run build
+
+FROM nginx:alpine
+RUN apk add --no-cache curl
+COPY --from=builder /app/nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=builder /app/dist /usr/share/nginx/html
+EXPOSE 7777
+CMD ["nginx", "-g", "daemon off;"]