feat: add docker image and readme

Dockerfile

@@ -0,0 +1,14 @@
+FROM node:22-alpine AS build
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY tsconfig.json tsup.config.ts ./
+COPY src ./src
+RUN npm run build && npm prune --omit=dev
+
+FROM node:22-alpine
+WORKDIR /app
+ENV NODE_ENV=production
+COPY --from=build /app/node_modules ./node_modules
+COPY --from=build /app/dist ./dist
+ENTRYPOINT ["node", "dist/index.js"]