add dockerfile

Dockerfile

+# First stage
+FROM node:slim AS build
+
+WORKDIR /app
+
+COPY package*.json  ./
+
+RUN npm install
+
+COPY . .
+
+RUN npm run build
+
+
+# Second stage
+FROM node:alpine AS run
+
+WORKDIR /app
+
+COPY package*.json  ./
+
+RUN npm install --omit=dev
+
+COPY --from=build /app/dist ./dist
+
+CMD [ "node", "dist/index.js" ]
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