37 lines
1.3 KiB
JavaScript
37 lines
1.3 KiB
JavaScript
// simple node web server that displays hello world
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// optimized for Docker image
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const express = require("express");
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// this example uses express web framework so we know what longer build times
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// do and how Dockerfile layer ordering matters. If you mess up Dockerfile ordering
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// you'll see long build times on every code change + build. If done correctly,
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// code changes should be only a few seconds to build locally due to build cache.
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const morgan = require("morgan");
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// morgan provides easy logging for express, and by default it logs to stdout
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// which is a best practice in Docker. Friends don't let friends code their apps to
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// do app logging to files in containers.
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const database = require("./database");
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// Appi
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const app = express();
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app.use(morgan("common"));
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app.get("/", function(req, res, next) {
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database.raw('select VERSION() version')
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.then(([rows, columns]) => rows[0])
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.then((row) => res.json({ message: `Hello from MySQL ${row.version}` }))
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.catch(next);
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});
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app.get("/healthz", function(req, res) {
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// do app logic here to determine if app is truly healthy
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// you should return 200 if healthy, and anything else will fail
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// if you want, you should be able to restrict this to localhost (include ipv4 and ipv6)
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res.send("I am happy and healthy\n");
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});
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module.exports = app;
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