Initial API scaffold: Elysia + Bun + Drizzle + BetterAuth + LangChain

Dockerfile

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+FROM oven/bun:1 AS base
+WORKDIR /app
+
+# Install dependencies
+FROM base AS install
+COPY package.json bun.lockb ./
+RUN bun install --frozen-lockfile --production
+
+# Production image
+FROM base AS release
+COPY --from=install /app/node_modules ./node_modules
+COPY . .
+
+ENV NODE_ENV=production
+EXPOSE 3000
+
+USER bun
+CMD ["bun", "run", "src/index.ts"]