add more documentation

Signed-off-by: Achille Roussel <[email protected]>

Author: achille-roussel

grpc/grpc.go

@@ -1,6 +1,15 @@
 // Package grpc provides an example of gRPC client and server running in a
 // program compiled to GOOS=wasip1
 //
+// The protoc compiler must be installed in order to build the tests in this
+// package, as well as the following extension:
+//
+//	$ go install google.golang.org/protobuf/cmd/[email protected]
+//	$ go install google.golang.org/grpc/cmd/[email protected]
+//
+// For the full documentation on how to use gRPC, see:
+// https://grpc.io/docs/languages/go/quickstart/
+//
 // When compiling to other targets than GOOS=wasip1, importing this package has
 // no effect.
 package grpc