fixing quotes in .stage.env

Author: rodolfoIOET

.stage.env

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1.2
 
-FROM node:14 AS building
+FROM node:14-alpine AS building
 WORKDIR /app
 # ENV USERNAME timetracker
 # ENV HOME /home/${USERNAME}
@@ -13,7 +13,7 @@ COPY . /app
 RUN npm cache clean --force && npm install
 EXPOSE 4200
 EXPOSE 9876
-RUN --mount=type=secret,id=mysecret,dst=/foobar  eval '$(echo $(cat /foobar))' && npm run build 
+RUN --mount=type=secret,id=mysecret,dst=/foobar  source /foobar && npm run build 
 # >> scrt && 
 #