Initial Docker deployment setup

Dockerfile

@@ -0,0 +1,31 @@
+# syntax=docker/dockerfile:1
+
+FROM node:25-bookworm-slim AS builder
+
+WORKDIR /build
+
+ENV ELECTRON_SKIP_BINARY_DOWNLOAD=1
+
+COPY upstream/HubFrontend/package.json upstream/HubFrontend/package-lock.json upstream/HubFrontend/.npmrc ./
+RUN --mount=type=cache,target=/root/.npm npm ci
+
+COPY upstream/HubFrontend/ ./
+
+ARG ASSETS_BASE=""
+ARG VITE_USE_MULTIHUB=false
+ARG VITE_MULTIHUB_DISCOVERY=""
+ARG VITE_CONFIG_URL
+
+ENV ASSETS_BASE=${ASSETS_BASE} \
+    VITE_USE_MULTIHUB=${VITE_USE_MULTIHUB} \
+    VITE_MULTIHUB_DISCOVERY=${VITE_MULTIHUB_DISCOVERY} \
+    VITE_CONFIG_URL=${VITE_CONFIG_URL}
+
+RUN npm run build
+
+FROM nginx:alpine AS runtime
+
+COPY nginx/default.conf /etc/nginx/conf.d/default.conf
+COPY --from=builder /build/build/ /usr/share/nginx/html/
+
+EXPOSE 8080