Add HTTP API

Add `-api` mode to start the HTTP API with the following routes:
- /health
- /shops
- /shops/:id
- /products
- /products/:id

Signed-off-by: Julien Riou <julien@riou.xyz>

main.go

@@ -52,6 +52,7 @@ func main() {
 	workers := flag.Int("workers", 1, "number of workers for parsing shops")
 	pidFile := flag.String("pid-file", "", "write process ID to this file to disable concurrent executions")
 	pidWaitTimeout := flag.Int("pid-wait-timeout", 0, "seconds to wait before giving up when another instance is running")
+	api := flag.Bool("api", false, "Start the HTTP API")
 
 	flag.Parse()
 
@@ -114,6 +115,11 @@ func main() {
 		log.Fatalf("cannot create shops table")
 	}
 
+	// start the api
+	if *api {
+		log.Fatal(StartAPI(db, config.ApiConfig))
+	}
+
 	// register notifiers
 	notifiers := []Notifier{}