Add example for rendering subprocess output (#406)

Author: kostia1359

examples/subprocess-output/index.js

@@ -0,0 +1,2 @@
+'use strict';
+require('import-jsx')('./subprocess-output');

examples/subprocess-output/subprocess-output.js

@@ -0,0 +1,29 @@
+'use strict';
+const childProcess = require('child_process');
+const React = require('react');
+const stripAnsi = require('strip-ansi');
+const {render, Text, Box} = require('../..');
+
+const SubprocessOutput = () => {
+	const [output, setOutput] = React.useState('');
+
+	React.useEffect(() => {
+		const subProcess = childProcess.spawn('node', ['examples/jest']);
+
+		subProcess.stdout.on('data', newOutput => {
+			const lines = stripAnsi(newOutput.toString('utf8')).split('\n');
+			setOutput(lines.slice(-5).join('\n'));
+		});
+	}, [setOutput]);
+
+	return (
+		<Box flexDirection="column" padding={1}>
+			<Text>Сommand output:</Text>
+			<Box marginTop={1}>
+				<Text>{output}</Text>
+			</Box>
+		</Box>
+	);
+};
+
+render(<SubprocessOutput />);

readme.md

@@ -1766,6 +1766,7 @@ You can even inspect and change the props of components, and see the results imm
 - [Write to stdout](examples/use-stdout/use-stdout.js) - Write to stdout bypassing main Ink output.
 - [Write to stderr](examples/use-stderr/use-stderr.js) - Write to stderr bypassing main Ink output.
 - [Static](examples/static/static.js) - Use `<Static>` to render permanent output.
+- [Child process](examples/subprocess-output) - Render output from a child process.
 
 ## Maintainers