MM-14827 don't kill STDOUT for the server process (#10828)

Makefile

@@ -361,11 +361,11 @@ ifeq ($(BUILDER_GOOS_GOARCH),"windows_amd64")
 	wmic process where "Caption='go.exe' and CommandLine like '%go.exe run%'" call terminate
 	wmic process where "Caption='mattermost.exe' and CommandLine like '%go-build%'" call terminate
 else
-	@for PID in $$(ps -ef | grep "[g]o run" | awk '{ print $$2 }'); do \
+	@for PID in $$(ps -ef | grep "[g]o run" | grep "disableconfigwatch" | awk '{ print $$2 }'); do \
 		echo stopping go $$PID; \
 		kill $$PID; \
 	done
-	@for PID in $$(ps -ef | grep "[g]o-build" | awk '{ print $$2 }'); do \
+	@for PID in $$(ps -ef | grep "[g]o-build" | grep "disableconfigwatch" | awk '{ print $$2 }'); do \
 		echo stopping mattermost $$PID; \
 		kill $$PID; \
 	done

cmd/mattermost/commands/server.go

@@ -91,7 +91,7 @@ func runServer(configStore config.Store, disableConfigWatch bool, usedPlatform b
 
 	// wait for kill signal before attempting to gracefully shutdown
 	// the running service
-	signal.Notify(interruptChan, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
+	signal.Notify(interruptChan, os.Interrupt, syscall.SIGINT, syscall.SIGTERM, syscall.SIGPIPE)
 	<-interruptChan
 
 	return nil