init: HejYou API Server (Hono + Node.js + TypeScript)

Thin proxy between React app and Directus.
Admin token stays server-side; clients get own 30-day JWTs.
Endpoints: /auth/* register/login/profile/me, /words, /questions,
/qa-pairs, /pair, /progress, /assets/:fileId

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

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+# Stage 1: Build
+FROM node:20-alpine AS build
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci
+
+COPY tsconfig.json ./
+COPY src ./src
+RUN npm run build
+
+# Stage 2: Runtime
+FROM node:20-alpine AS runtime
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci --omit=dev
+
+COPY --from=build /app/dist ./dist
+
+EXPOSE 3000
+
+CMD ["node", "dist/index.js"]