chore: create docker multistage build

Author: PierreJeanjacquot

Dockerfile

@@ -1,17 +1,29 @@
-FROM node:20-alpine
+FROM node:20-alpine AS builder
 
 WORKDIR /app
 
 COPY . .
 
-RUN npm install
+RUN npm ci
 
 RUN npm run build
 
-# Expose the port (only useful for remote mode)
-EXPOSE 3001
+FROM node:20-alpine AS server
+
+WORKDIR /app
+
+COPY --from=builder /app/package*.json .
+
+COPY --from=builder /app/build ./build
 
 ENV NODE_ENV=production
 
+RUN npm ci --omit=dev
+
+RUN npm i --omit=dev -g .
+
+# Expose the port (only useful for remote mode)
+EXPOSE 3001
+
 # Start the MCP server (by default using stdio)
-CMD ["node", "build/index.js"]
+CMD ["iexec-mcp"]