why exactly do we need containers in software development?
Imagine that you are developing a JavaScript code, which uses a feature called top-level await.
In this case, we need Node.js 14.3 or higher, you know, we have it and the execution running successfully. But what if we then take this application, and we deploy it onto some remote machine onto a server, they might have an older version of Node.js installed, maybe 14.1, or 12, or eight, whatever. And all of a sudden, the code which worked locally on our machine doesn't work there anymore.
And that is something where Docker and containers can help!
import express from 'express';
import connectToDatabse from '/...'
const app = express();
app.get('/', (req, res) => {
res.send('<h1> HELLO GITHUB </h1>')
});
await connectToDatabse();
app.listen(3000);
- Exact same environment for development and production, this ensures that it works exactly as tested.
- It should be easy to share a common developement enviroment to set up with employees and collagues.
- we don't want to uninstall and re-install local dependencies and runtimes all the time.
- Low impact on OS, very fast, minimal disk space usage.
- Sharing, re-building and distribution is easy.
- Encapsulates apps/enviroments instead of "whole machines".
Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
Please make sure to update tests as appropriate.