Opt-out of dotnet telemetry for btcpay

This is done by setting an environment variable in the systemd unit

Fixes #441

site-cookbooks/kosmos-bitcoin/recipes/btcpay.rb

@@ -74,6 +74,8 @@ if node["nbxplorer"]["postgres"]
   nbxpg_connect = "User ID=#{nbxpg_user};Password=#{nbxplorer_credentials['postgresql_password']};Database=#{nbxpg_database};Host=pg.kosmos.local;Port=5432;Application Name=btcpayserver;MaxPoolSize=80"
 end
 
+systemd_unit_env = "'DOTNET_CLI_TELEMETRY_OPTOUT=1'"
+systemd_unit_env << " 'BTCPAY_EXPLORERPOSTGRES=#{nbxpg_connect}'" if defined?(nbxpg_connect)
 systemd_unit 'btcpayserver.service' do
   content({
     Unit: {
@@ -87,7 +89,7 @@ systemd_unit 'btcpayserver.service' do
       Group: node['bitcoin']['usergroup'],
       Type: 'simple',
       WorkingDirectory: node['btcpay']['source_dir'],
-      Environment: defined?(nbxpg_connect) ? "'BTCPAY_EXPLORERPOSTGRES=#{nbxpg_connect}'" : '',
+      Environment: systemd_unit_env,
       ExecStart: "#{node['btcpay']['source_dir']}/run.sh --conf=#{node['btcpay']['config_path']}",
       PIDFile: '/run/btcpayserver/btcpayserver.pid',
       Restart: 'on-failure',
@@ -103,6 +105,7 @@ systemd_unit 'btcpayserver.service' do
   verify false
   triggers_reload true
   action [:create]
+  notifies :reload, "systemd_unit[btcpayserver.service]", :delayed
 end
 
 service "btcpayserver" do