updated dockerfile

Dockerfile

@@ -0,0 +1,25 @@
+FROM node:latest as builder
+
+WORKDIR /app
+
+COPY . .
+
+RUN yarn install --frozen-lockfile
+RUN yarn build
+
+FROM node:alpine
+
+WORKDIR /app
+
+COPY --from=builder /app/package.json /app/yarn.lock ./
+COPY --from=builder /app/build ./
+
+RUN yarn install --frozen-lockfile --production
+
+RUN apk add curl
+HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3\
+ CMD [ "curl", "--fail", "--silent", "--output", "/dev/null", "localhost:3000/api/health" ]
+
+EXPOSE 3000
+
+CMD ["node", "./index.js"]