update health checks

app/routes/_status+/health.tsx

@@ -0,0 +1,26 @@
+// learn more: https://fly.io/docs/reference/configuration/#services-http_checks
+import { type LoaderFunctionArgs } from '@remix-run/node'
+import { prisma } from '#app/utils/db.server.ts'
+
+export async function loader({ request }: LoaderFunctionArgs) {
+	const host =
+		request.headers.get('X-Forwarded-Host') ?? request.headers.get('host')
+
+	try {
+		// if we can connect to the database and make a simple query
+		// and make a HEAD request to ourselves, then we're good.
+		await Promise.all([
+			prisma.user.count(),
+			fetch(`${new URL(request.url).protocol}${host}`, {
+				method: 'HEAD',
+				headers: { 'X-Healthcheck': 'true' },
+			}).then(r => {
+				if (!r.ok) return Promise.reject(r)
+			}),
+		])
+		return new Response('OK')
+	} catch (error: unknown) {
+		console.log('healthcheck ❌', { error })
+		return new Response('ERROR', { status: 500 })
+	}
+}

fly.toml

@@ -42,8 +42,8 @@ script_checks = [ ]
   [[services.http_checks]]
   interval = "10s"
   grace_period = "5s"
-  method = "get"
-  path = "/resources/healthcheck"
+  method = "GET"
+  path = "/health"
   protocol = "http"
   timeout = "2s"
   tls_skip_verify = false