Add health check endpoint

health.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"net/http"
+)
+
+func healthCheck() {
+	http.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("Healthy"))
+	})
+}

main.go

@@ -3,5 +3,6 @@ package main
 func main() {
 	initDatabases()
 	go startUpdater()
+	healthCheck()
 	startServer()
 }