add environment variable DISCOVERY_AS_LOCALHOST

Signed-off-by: Acmefocus <107723772@qq.com>

fabcar/go/fabcar.go

@@ -18,6 +18,7 @@ import (
 )
 
 func main() {
+	os.Setenv("DISCOVERY_AS_LOCALHOST", "true")
 	wallet, err := gateway.NewFileSystemWallet("wallet")
 	if err != nil {
 		fmt.Printf("Failed to create wallet: %s\n", err)

fabcar/startFabric.sh

@@ -109,12 +109,8 @@ Go:
   Start by changing into the "go" directory:
     cd go
 
-  Set environment variable DISCOVERY_AS_LOCALHOST to true, to indicate to ServiceDiscovery that all hostnames maps to localhost
-
   Then, install dependencies and run the test using:
     go run fabcar.go
-  or
-    ./runfabcar.sh
 
   The test will invoke the sample client app which perform the following:
     - Import user credentials into the wallet (if they don't already exist there)