add info about traefik secrets to readme

README.md

@@ -222,6 +222,12 @@ Sensitive environment variables are not included in the .env files, and must be
 printf "<OS_PASSWORD_DOWNLOAD>" | docker secret create OS_PASSWORD_DOWNLOAD -
 printf "<DJANGO_PASSWORD>" | docker secret create DJANGO_PASSWORD -
 printf "<OS_PASSWORD>" | docker secret create OS_PASSWORD -
+# for production base stack deployment, additonal basic authentication credentials list need to be created
+# format of such a list used by traefik are username:hashedpassword (MD5, SHA1, BCrypt)
+sudo apt-get install apache2-utils
+htpasswd -n <username> >> auth_list.txt
+docker secret create BASIC_AUTH_USERS_AUTH auth_list.txt
+docker secret create BASIC_AUTH_USERS_APIAUTH auth_list_api.txt
 ```
 
 Deploy the stack in dev environment: