docker: add Dockerfile for docker/mcp-registry

Author: ratamaha-git

Dockerfile

@@ -0,0 +1,23 @@
+FROM node:20-alpine AS builder
+
+WORKDIR /app
+
+COPY package*.json tsconfig.json ./
+RUN npm ci
+
+COPY src/ ./src/
+RUN npm run build
+
+FROM node:20-alpine
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm ci --omit=dev
+
+COPY --from=builder /app/dist ./dist
+
+ENV DISTRIBUTION_BACKEND_DIR=/data
+VOLUME /data
+
+ENTRYPOINT ["node", "dist/index.js"]