Add proper logfile support

shared/isWritable_windows.go

@@ -0,0 +1,23 @@
+package shared
+
+import "os"
+
+// Copied from https://stackoverflow.com/a/20026945 and https://stackoverflow.com/a/49148866
+func IsWritable(path string) bool {
+	info, err := os.Stat(path)
+	if err != nil {
+		return false
+	}
+
+	err = nil
+	if !info.IsDir() {
+		return false
+	}
+
+	// Check if the user bit is enabled in file permission
+	if info.Mode().Perm()&(1<<(uint(7))) == 0 {
+		return false
+	}
+
+	return true
+}