react server side rendering babel configuration - reactjs

Question

I'm trying to server render a react app, I configured babel with preset-env in order to allow the use of import statement but it seems to be not working, ,when I launch the server I get this error :SyntaxError: Cannot use import statement outside a module
package.json :
"babel": {
"presets": [
"react",
"env",
"stage-2"
]
},
"devDependencies": {
"babel-eslint": "^7.2.3",
"eslint": "^3.19.0",
"eslint-plugin-react": "^6.10.3",
"jest": "^19.0.2"
},
"dependencies": {
"babel-cli": "^6.24.1",
"babel-loader": "^7.0.0",
"babel-polyfill": "^6.23.0",
"babel-preset-env": "^1.4.0",
"babel-preset-react": "^6.24.1",
"babel-preset-stage-2": "^6.24.1",
"ejs": "^2.5.6",
"express": "^4.15.2",
"pm2": "^2.4.6",
"react": "^15.5.4",
"react-dom": "^15.5.4",
"webpack": "^2.5.0"
server.js :
app.use("/", (req,res)=>{
const initialContent = serverRender();
res.render("index",{initialContent});
});
serverRender.js :
import React from "react";
import ReactDOMServer from "react-dom/server";
import App from "./components/app";
const serverRender =()=>{
return ReactDOMServer.renderToString(<App/>);
};
export default serverRender;

Answer 1

i am using babel on my server side my package.json has those babel related packages.
"scripts": {
"babel-node": "babel-node ",
"start": "nodemon --exec npm run babel-node -- ./app.js",
},
"devDependencies": {
"babel-polyfill": "^6.26.0",
"babel-cli": "^6.26.0",
"babel-eslint": "^8.2.2",
"babel-plugin-transform-runtime": "^6.23.0",
"babel-preset-env": "^1.7.0",
"babel-preset-latest": "^6.24.1",
"babel-register": "^6.26.0",
}
for preset i have created .babelrc file
{
"presets": ["env"],
"plugins": [
[
"transform-runtime",
{
"polyfill": false,
"regenerator": true
}
],
]
}
hope it helps