fix(scripts): forget exit on error!

entrypoint.sh

@@ -20,12 +20,15 @@ else
     # check for missing environment variable values
     if [ -z "$SMARTHOST" ]; then
         printf "\nYou must specify the hostname or IP address of a smarthost where mail should be relayed.\n\n"
+        exit 1
     fi
     if [ -z "$SMARTHOST_USERNAME" ]; then
         printf "\nYou must provide a username for smarthost authentication.\n\n"
+        exit 1
     fi
     if [ -z "$SMARTHOST_PASSWORD" ]; then
         printf "\nYou must provide a password for smarthost authentication.\n\n"
+        exit 1
     fi
 
     # set failsafes