Simplified (somewhat) the container working directory handling, as pr…

…eviously I found some edge cases that caused issues with the static directory that was mounted

invoke.go

@@ -93,6 +93,7 @@ func invoke(c *cli.Context) {
 		DebugPort:       c.String("debug-port"),
 		SkipPullImage:   c.Bool("skip-pull-image"),
 	})
+
 	if err != nil {
 		log.Fatalf("Could not initiate %s runtime: %s\n", function.Runtime, err)
 	}

start.go

@@ -58,6 +58,11 @@ func start(c *cli.Context) {
 
 	for name, function := range functions {
 
+		cwd := filepath.Dir(filename)
+		if c.String("docker-volume-basedir") != "" {
+			cwd = c.String("docker-volume-basedir")
+		}
+
 		// Initiate a new Lambda runtime
 		runt, err := NewRuntime(NewRuntimeOpt{
 			Cwd:             cwd,