Thanks for sending along all that info @Jules_Huguenin.
You will need to uncomment the lines in your configuration file. So, your updated UDP config section will look like this:
[udp]
# Address for UDP server - CLI: --udp-address, EnvVar: UDP_ADDRESS
address = '0.0.0.0'
EDIT: The UDP address for the Edge Agent defaults to 0.0.0.0, so uncommenting the address in the config is only necessary if you plan on changing the UDP address.
Then, in your Docker Run command, it looks like you may have mixed up the ports. The -p flag is hostPort:containerPort. If your server is expecting UDP messages on port 20500, then you’ll need to change that publish line to -p 20500:20500/udp.
I will make some updates to our documentation to better reflect what needs to be done to make this work.
Let me know if this works for you.
Thank you,
Heath