small refactoring

server.go

@@ -7,17 +7,11 @@ import (
 )
 
 func main() {
-	context := Context{"/tmp/restic"}
+	context := NewContext("/tmp/restic")
 
 	repo, _ := context.Repository("user")
 	repo.Init()
 
-	errc := context.Init()
-	if errc != nil {
-		log.Println("context initialization failed")
-		return
-	}
-
 	router := Router{context}
 	port := ":8000"
 	log.Printf("start server on port %s", port)