fix: add nginx in dockerfile

Dockerfile

@@ -4,4 +4,10 @@ WORKDIR /app
 COPY package*.json ./
 RUN yarn install
 COPY . .
-RUN yarn run build
+RUN yarn run build
+
+# production stage
+FROM nginx:stable-alpine as production-stage
+COPY --from=build-stage /app/dist /usr/share/nginx/html
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]