add pre_build hook

hooks/pre_build

@@ -0,0 +1,13 @@
+#!/bin/bash
+cat << EOF >> YYeTsFE/.env
+SENTRY_ORG=$SENTRY_ORG
+SENTRY_PROJECT=$SENTRY_PROJECT
+SENTRY_AUTH_TOKEN=$SENTRY_AUTH_TOKEN
+
+
+REACT_APP_SENTRY_DSN=$REACT_APP_SENTRY_DSN
+REACT_APP_DOMAIN=$REACT_APP_DOMAIN
+REACT_APP_GA=$REACT_APP_GA
+# sourcemap
+GENERATE_SOURCEMAP=$GENERATE_SOURCEMAP
+EOF