Syslog forwarding with HAProxy and Docker

Demonstrates using log-forward to forward logs from the Docker daemon.

Run it

Create the environment:
```
$ vagrant up
```
SSH onto the HAProxy machine, where Docker is also installed.
```
$ vagrant ssh haproxy
```
Start a Docker container:
```
$ sudo docker run -p 80:80 -it --rm nginx:latest
```
You can then make requests to it via http://192.168.56.41.
SSH onto the syslog server:
```
$ vagrant ssh syslog1
```
Start the rsyslog Docker container, which listens for incoming messages with the local1 facility:
```
$ cd /vagrant/syslog1
$ sudo docker compose -f docker-compose.rsyslog.yml up -d
```

Watch the NGINX logs come through on the syslog server:

$ sudo docker compose -f docker-compose.rsyslog.yml logs -f syslog1

$ vagrant destroy