feature(worker): context object to store runtime configurations

worker/provider.go

@@ -0,0 +1,13 @@
+// mirror provider is the wrapper of mirror jobs
+
+package worker
+
+// a mirrorProvider instance
+type mirrorProvider interface {
+	// run mirror job
+	Run()
+	// terminate mirror job
+	Terminate()
+	// get context
+	Context()
+}