Simple UI: Streaming upload (#2254)

thus not loading whole artifact into memory

Signed-off-by: Avgustin Marinov <Avgustin.Marinov@bosch.com>

hawkbit-simple-ui/src/main/resources/application.properties

@@ -16,8 +16,9 @@ logging.level.org.springframework.boot.actuate.audit.listener.AuditListener=WARN
 # logging pattern
 logging.pattern.console=%clr(%d{${logging.pattern.dateformat:yyyy-MM-dd'T'HH:mm:ss.SSSXXX}}){faint} %clr(${logging.pattern.level:%5p}) %clr(${PID:}){magenta} %clr(---){faint} %clr([${spring.application.name}] [%X{tenant}:%X{user}] [%15.15t]){faint} %clr(${logging.pattern.correlation:}){faint}%clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${logging.exception-conversion-word:%wEx}
 
-### Vaadin start ###`
+### Vaadin start ###
 # build with mvn vaadin:build-frontend to enable / disable
+vaadin.productionMode=true
 vaadin.frontend.hotdeploy=false
 logging.level.org.atmosphere=warn
 spring.mustache.check-template-location=false