feat: First iteration, multi themes, I18N

Dockerfile

@@ -0,0 +1,23 @@
+# One small image runs the whole game: a zero-dependency Node server that
+# serves the static frontend and lists the installed themes/languages.
+FROM node:24-alpine
+
+ENV NODE_ENV=production \
+    PORT=8080
+
+WORKDIR /app
+
+# Files stay owned by root and read-only for the runtime user: the app can't modify itself.
+COPY package.json ./
+COPY server ./server
+COPY public ./public
+
+# Run as the unprivileged "node" user (uid 1000) that ships with the image.
+USER node
+
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD ["node", "-e", "fetch('http://127.0.0.1:' + process.env.PORT + '/healthz').then(r => process.exit(r.ok ? 0 : 1), () => process.exit(1))"]
+
+CMD ["node", "server/index.js"]