trying to get rid of segfault, changing to ubuntu

Dockerfile

@@ -3,8 +3,8 @@ FROM ubuntu:latest
 RUN apt-get update && apt-get upgrade -y
 
 # add user that will be used to install and run the application
-RUN addgroup -g 1000 deploy
-RUN adduser -D -u 1000 -G deploy deploy
+RUN groupadd -g 1000 deploy
+RUN useradd -u 1000 -g deploy deploy
 
 #
 # CUSTOM PART IS BELOW HERE