front: finish docx & back: init

main.go

@@ -1,5 +1,39 @@
 package main
 
-func main() {
+import (
+	"flag"
+	"net"
+	"net/http"
+	"os"
+	"runtime"
 
+	"github.com/sirupsen/logrus"
+
+	"github.com/fumiama/paper-manager/backend/api"
+	"github.com/fumiama/paper-manager/backend/file"
+)
+
+func line() int {
+	_, _, fileLine, ok := runtime.Caller(1)
+	if ok {
+		return fileLine
+	}
+	return -1
+}
+
+func main() {
+	addr := flag.String("l", "[::]:3000", "listen addr")
+	flag.Parse()
+	l, err := net.Listen("tcp", *addr)
+	if err != nil {
+		logrus.Errorln("[net.Listen]\t", err)
+		os.Exit(line())
+	}
+
+	http.HandleFunc("/api/", api.Handler)
+	http.HandleFunc("/file/", file.Handler)
+
+	logrus.Infoln("[http.Serve]\t start at", l.Addr())
+	logrus.Errorln("[http.Serve]\t", http.Serve(l, nil))
+	os.Exit(line())
 }