make docker size smaller

Author: gitricko

docker/Dockerfile

@@ -1,8 +1,17 @@
 # Using 18 alpine because supports arm/v8 and arm/v8 needed for silicon chips
-FROM node:18-alpine
+
+# Builder stage with build tools
+FROM node:18-alpine AS builder
 RUN apk add --no-cache bash python3 make g++
 WORKDIR /app
 ADD ./ .
 RUN npm install
 RUN npm run build
+
+# Runtime stage - minimal
+FROM node:18-alpine
+RUN apk add --no-cache bash
+WORKDIR /app
+ADD ./ .
+COPY --from=builder /app/node_modules /app/node_modules
 CMD ["npm", "start"]