diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..74bc3d4
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,13 @@
+node_modules
+dist
+.git
+.github
+__tests__
+coverage
+*.tsbuildinfo
+.env*
+.claude
+foundation
+CLAUDE.md
+.foundation-*
+vitest.config.ts
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..1374b82
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,21 @@
+FROM node:18-alpine AS builder
+WORKDIR /app
+COPY package.json package-lock.json* ./
+RUN if [ -f package-lock.json ]; then npm ci --include=optional; else npm install --include=optional; fi
+COPY tsconfig.json ./
+COPY src/ ./src/
+RUN npm run build
+
+FROM node:18-alpine
+WORKDIR /app
+ENV NODE_ENV=production
+COPY package.json package-lock.json* ./
+RUN if [ -f package-lock.json ]; then npm ci --omit=dev --include=optional; else npm install --omit=dev --include=optional; fi && npm cache clean --force
+COPY --from=builder /app/dist/ ./dist/
+RUN mkdir -p /home/node/.relayplane && \
+    chown -R node:node /home/node/.relayplane
+USER node
+EXPOSE 4801
+ENV RELAYPLANE_PROXY_HOST=0.0.0.0
+ENV RELAYPLANE_PROXY_PORT=4801
+ENTRYPOINT ["node", "dist/cli.js"]