feat(brain): @mosaic/brain structured data service (#11)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

packages/brain/Dockerfile

@@ -0,0 +1,18 @@
+FROM node:22-alpine AS builder
+WORKDIR /app
+COPY package.json tsconfig.json ./
+COPY src/ src/
+# In standalone mode, @mosaic/types is bundled or installed from registry
+RUN npm install && npm run build
+
+FROM node:22-alpine
+WORKDIR /app
+COPY --from=builder /app/dist/ dist/
+COPY --from=builder /app/node_modules/ node_modules/
+COPY package.json ./
+ENV NODE_ENV=production
+ENV PORT=8100
+ENV MOSAIC_BRAIN_DATA_DIR=/data
+EXPOSE 8100
+VOLUME /data
+CMD ["node", "dist/index.js"]