rename variable

Author: KannappanSomu

Dockerfile

@@ -30,7 +30,7 @@ RUN yarn build
 FROM helsinki.azurecr.io/nginx-spa-standard:1.0 AS production
 
 ARG REACT_APP_SENTRY_RELEASE
-ENV REACT_APP_RELEASE=${REACT_APP_SENTRY_RELEASE:-""}
+ENV APP_RELEASE=${REACT_APP_SENTRY_RELEASE:-""}
 # 1. Copy the compiled assets
 COPY --from=staticbuilder /app/build /usr/share/nginx/html