Set enabled_uplink_channels as environment variable in docker-compose

[jceloria]

• [x] The issue is present in the latest release.
• [x] I have searched the issues of this repository and believe that this is not a duplicate.

What happened?

I configured my docker-compose file with environment variables which work fine, I then attempted to configure enabled_uplink_channels by setting the NETWORK_SERVER__NETWORK_SETTINGS__ENABLED_UPLINK_CHANNELS environment variable. I run docker-compose up and the network-server fails to start

What did you expect?

The network-server to start successfully with the applied configuration

Steps to reproduce this issue

Steps:

1. configure the network-server service in docker-compose.yaml with the following:

   services:
   network-server:
   environment:
   - NETWORK_SERVER__NETWORK_SETTINGS__ENABLED_UPLINK_CHANNELS=[0, 1, 2, 3, 4, 5, 6, 7]
   ...

2. run: docker-compose up

Could you share your log output?

time="2020-06-19T15:17:09Z" level=warning msg="No configuration file found, using defaults. See: https://www.chirpstack.io/network-server/install/config/"
time="2020-06-19T15:17:09Z" level=fatal msg="unmarshal config error" error="1 error(s) decoding:\n\n* error decoding 'network_server.network_settings.enabled_uplink_channels': json: cannot unmarshal number into Go value of type map[string]interface {}"

Your Environment

Component	Version
Application Server	v3.10.0
Network Server	v3.9.0
Gateway Bridge	v3.8.0

[jceloria]

Never mind, no quotes, no spaces... - NETWORK_SERVER__NETWORK_SETTINGS__ENABLED_UPLINK_CHANNELS=0,1,2,3,4,5,6,7,64