Apply suggestions from code review

Author: Rick-Anderson

aspnetcore/security/includes/docker-compose-https7.md

@@ -65,12 +65,12 @@ services:
     environment:
       - ASPNETCORE_ENVIRONMENT=Development
       - ASPNETCORE_URLS=https://+:443;http://+:80
-      - ASPNETCORE_Kestrel__Certificates__Default__Password=$CREDENTIAL_PLACEHOLDER$
+      - ASPNETCORE_Kestrel__Certificates__Default__Password=-\0pw-
       - ASPNETCORE_Kestrel__Certificates__Default__Path=/https/aspnetapp.pfx
     volumes:
       - ~/.aspnet/https:/https:ro
 ```
-The password specified in the docker compose file must match the password used for the certificate. In the preceding commands, replace `$CREDENTIAL_PLACEHOLDER$` with a password.
+The password specified in the docker compose file must match the password used for the certificate. In the preceding commands, replace `-\0pw-` with a password.
 
 
 Start the container with ASP.NET Core configured for HTTPS:
@@ -144,12 +144,13 @@ services:
     environment:
       - ASPNETCORE_ENVIRONMENT=Development
       - ASPNETCORE_URLS=https://+:443;http://+:80
-      - ASPNETCORE_Kestrel__Certificates__Default__Password=$CREDENTIAL_PLACEHOLDER$
+      - ASPNETCORE_Kestrel__Certificates__Default__Password=-\0pw-
       - ASPNETCORE_Kestrel__Certificates__Default__Path=C:\https\aspnetapp.pfx
     volumes:
       - ${USERPROFILE}\.aspnet\https:C:\https:ro
 ```
-The password specified in the docker compose file must match the password used for the certificate. In the preceding commands, replace `$CREDENTIAL_PLACEHOLDER$` with a password.
+```suggestion
+The password specified in the docker compose file must match the password used for the certificate. In the preceding commands, replace `-\0pw-` with a password.
 
 
 Start the container with ASP.NET Core configured for HTTPS: