Make it clearer that proxy containers are not where project services are running

Looking at a log for the voting app:

[13:42:21 INF] Running image redis for redis_06610a82-7
[13:42:21 INF] Running image postgres for postgres_190bd61a-2
[13:42:21 INF] Running image mcr.microsoft.com/dotnet/core/sdk:3.1 for vote-proxy_105de2c0-e
[13:42:21 INF] Running image mcr.microsoft.com/dotnet/core/sdk:3.1 for worker-proxy_70879c25-7

This confused me for a second because I thought my projects were being run as containers, even though it's just the proxy. I'd recommend we change the log message to something like:

[13:42:21 INF] Running proxy image mcr.microsoft.com/dotnet/core/sdk:3.1 for worker-proxy_70879c25-7 to communicate with other docker images.

Or something to that effect.