update samples/README.md

Author: lainio

samples/README.md

@@ -1,23 +1,34 @@
 # Samples
 
 Please play with the samples by editing them and running the main files:
-- `main.go` just a starter for different playgrounds
-- `main-play.go` general playground based on CopyFile and recursion
-- `main-db-sample.go` simulates DB transaction and money transfer
+- `main.go` just a starter for different playgrounds (includes `asserter` tester)
+- `main-play.go` general playground based on `CopyFile` and recursion
+- `main-db-sample.go` simulates DB transaction with money transfer
 - `main-nil.go` samples and tests for logger and using `err2.Handle` for success
 
 Run a default playground `play` mode:
 ```go
-go run ./...
+go run .
 ```
 
-Or run the DB based version to maybe better understand how powerful the
-automatic error string building is:
+> [!TIP]
+> Set a proper alias to play with samples:
+> ```sh
+> alias sa='go run .'
+> ```
+
+Run the DB based version to maybe better understand how powerful the automatic
+error string building is:
+
 ```go
-go run ./... -mode db
+sa -mode db
+# or
+go run . -mode db
 ```
 
 You can print usage:
 ```go
-go run ./... -h
+sa -h
+# or
+go run . -h
 ```