chore: add node docker service for vite dev server and prod build

docker/node/Dockerfile

@@ -0,0 +1,24 @@
+FROM node:22-alpine AS base
+
+WORKDIR /app
+
+###
+# Dev stage
+###
+FROM base AS dev
+
+# Dependencies are mounted via volume, install at startup
+CMD ["sh", "-c", "npm install && npx vite"]
+
+###
+# Build stage (used by app prod image)
+###
+FROM base AS build
+
+COPY package.json package-lock.json* ./
+RUN npm install
+
+COPY assets/ ./assets/
+COPY vite.config.js ./
+
+RUN npm run build