I am deploying a Node.js application on Heroku. My production deployment is based on a Grunt task that minifies js and css files, placing them in a /dist folder from which they are called.
How can I add this step on the Heroku deployment?
Use a postinstall script, as outlined in Heroku's DevCenter docs for node:
https://devcenter.heroku.com/articles/node-with-grunt
eg:
"scripts": {
"postinstall": "grunt uglify",
"start": "node server.js"
}
Related
I wrote an Express Server. How can I build it now to deploy it on a WebApp? I don't have any build scripts in the project..
Don't you have any script in your package.json ? Should be something like "start": "node ."
I have simple running react Server Side App .
GitHub Link for the repo, in the local env i have a build script that runs using npm start which starts the client and server builds and then i have a watcher which listen's to changes in file. This set up works really well locally.
"scripts": {
"start": "npm run dev",
"dev": "npm-run-all --parallel dev:*",
"dev:server": "nodemon --watch build --exec \"node build/bundle.js\"",
"dev:build-server": "webpack --config webpack.server.js --watch",
"dev:build-client": "webpack --config webpack.client.js --watch"
},
I tried to deploy these changes as a prod app to heroku here for some odd reason it never works and returns 503 . I have not added any changes to the build scripts in the package.json and tried deploying as is.
I thought it should work as the build log dosent give any errors on heroku but while trying to access the app it shows error and asks me to check app log but i am not using heroku cli and not planning on using it , and
thinking of auto deployment from github.
I am quite new to script/ largely build scripts trying to learn more on them.
How can we make sure this small React SSR git repo deploys and i am
able to access the home page .
I am not using heroku cli and not planning on using it
You should and I really recommend, as it's the best way to see errors that occurs after the build, why your app crashed and see the full logs. Even though you can see the logs from your heroku dashbord (More -> View logs), this only gives you the tail of the logs.
How can we make sure this small React SSR git repo deploys and i am able to access the home page.
Make sure the server is listening on the right port
by using process.env.PORT as heroku expose a dynamic port.
const port = process.env.PORT || 3000
app.listen(port, () => {
console.log('Listening on Port ' + port);
})
On heroku the NODE_ENV environment variable is set toproduction by default,
which means heroku will prune thedevDependencies after the build,
but in your case, you still need these dependencies to start your app with webpack.
You can fix this in two ways :
Customize your build process by adding a build script:
From your github
repo
:
"start": "webpack --config webpack.client.js; webpack --config webpack.server.js; node build/bundle.js"
to
"scripts": {
"start": "node build/bundle.js",
"build": "webpack --config webpack.client.js & webpack --config webpack.server.js",
"build:start": "webpack --config webpack.client.js && webpack --config webpack.server.js && node build/bundle.js",
}
Set the NODE_ENV to any other value to skip pruning your
devDependencies
heroku config:set NODE_ENV=development //(Another reason to use the CLI)
Check this link for more details
I'm trying to deploy my first node app to heroku. I have set up a Procfile with the following code
web: node ./app/server.js
but when I deploy to heroku and check the logs I see the error Error: Cannot find module '/app/server.js'.
On local it works fine. I have the following in my package.json nested under scripts
"start": "nodemon ./app/server.js
Nodemon is a utility that will monitor for any changes in your source and automatically restart your server. Perfect for development.
While using nodemon its better to maintain script commands for dev and production as follows:
"scripts": {
"start": "node ./app/server.js",
"dev": "nodemon ./app/server.js"
}
To determine how to start your app, The deployment server( Heroku) first looks for a Procfile. If no Procfile exists for a Node.js app, It will attempt to start a default web process via the start script in your package.json.
If you use nodemon in script, It'll internally try to run node server.js but in your case start file present in app/server.js. To avoid these issues it's better to use two separate script commands for dev and production. So that while running locally you can use npm dev command.
I currently have an npm project built with vue-cli and socket.io server.
This is how my project is structured:
Project/
|--node_server/
| |--server.js
|--src/
| |--main.js
| |--App.vue
| |--other .vue files and folders
I do not know how to deploy this app on Heroku because I will need to run two scripts while deploying that is node server.js (in the node_server folder) and npm run build or npm run dev (in the root folder).
What are the steps on how to deploy it successfully? Heroku takes my project from github whenever I push and builds it automatically. I have tried deploying but it ends up with an error page.
Let's say you need to build the front-end with build script first, and then you need to run nodejs server with start script which is node server.js.
...
"scripts": {
"build": "gulp or something idk"
"prestart": "npm run build",
"start": "node node_server/server.js",
},
...
But if you need to run these two scripts at the same time you can achieve this with something like that:
...
"scripts": {
"build": "gulp or something idk"
"start": "npm run build & node node_server/server.js",
},
...
I hope it would be helpful.
For an example, you can take a look at the package.json of one of my project: https://github.com/hisener/pirate-radio/blob/master/package.json
For more information, please refer https://docs.npmjs.com/misc/scripts
I am writing a Node.js app and using Heroku to host it. And also I use Webpack + Babel to bundle all my server files into one and to use ES2015 syntax. But the thing is, I need to build my app before running it. So I put this command into package.json:
"scripts": {
"start": "webpack && node build/server.js"
},
This works, but the problem is, when I run heroku restart, my app runs only after rebuild. And the same story when my app crashes.
So I guess I need 2 different commands: one on deploy (webpack) and one in npm start (node build/server.js)
How can I accomplish this?
Actually it was not that hard. Just had to change my package.json to
"scripts": {
"heroku-postbuild": "webpack",
"start": "node build/server.js"
}
(according to this article: Heroku Node.js Support)