fix dockerfile

Dockerfile

@@ -5,8 +5,7 @@ WORKDIR /app
 COPY package.json ./
 COPY package-lock.json ./
 RUN npm install
-COPY . ./
+COPY . .
 RUN npm run build
-
-FROM nginx:latest
-COPY --from=build /app/build /usr/share/nginx/html
+EXPOSE 3000
+CMD ["node", "build/index.js"]