Using specific channels for AP about wifi-repeater

[puccaso]

Ok just saw one of the pending PRs, with channel related code.
gonna add
const AP_CHANNEL = Number(process.env.AP_CHANNEL) || 6;
and see what happens.

[puccaso]

ok nope.
`[debug] handling message: {"message":"\u001b[32m[Success]\u001b[39m Successfully uploaded images"}
[Success] Successfully uploaded images
[debug] handling message: {"message":"\u001b[31m[Error]\u001b[39m Some services failed to build:","isError":true}
[Error] Some services failed to build:
[debug] handling message: {"message":"\u001b[31m[Error]\u001b[39m Service: wifi-repeater","isError":true}
[Error] Service: wifi-repeater
[debug] handling message: {"message":"\u001b[31m[Error]\u001b[39m Error: The command '/bin/sh -c npm install && npm run build' returned a non-zero code: 2","isError":true}
[Error] Error: The command '/bin/sh -c npm install && npm run build' returned a non-zero code: 2
[debug] handling message: {"message":"\u001b[36m[Info]\u001b[39m Built on arm06"}
[Info] Built on arm06
[debug] handling message: {"message":"\u001b[31m[Error]\u001b[39m Not deploying release.","isError":true}
[Error] Not deploying release.
Remote build failed

RemoteBuildFailedError: Remote build failed
at handleRemoteBuildStream (/usr/local/lib/balena-cli/build/utils/remote-build.js:83:15)
at runMicrotasks ()
at processTicksAndRejections (internal/process/task_queues.js:97:5)
at async Object.startRemoteBuild (/usr/local/lib/balena-cli/build/utils/remote-build.js:64:13)
at async PushCmd.pushToCloud (/usr/local/lib/balena-cli/build/commands/push.js:78:27)
at async PushCmd.run (/usr/local/lib/balena-cli/build/commands/push.js:32:17)
at async PushCmd._run (/usr/local/lib/balena-cli/node_modules/@oclif/command/lib/command.js:43:20)
at async Config.runCommand (/usr/local/lib/balena-cli/node_modules/@oclif/config/lib/config.js:175:24)
at async CustomMain.run (/usr/local/lib/balena-cli/node_modules/@oclif/command/lib/main.js:27:9)
at async CustomMain._run (/usr/local/lib/balena-cli/node_modules/@oclif/command/lib/command.js:43:20)
at async /usr/local/lib/balena-cli/build/app.js:76:13
at async Promise.all (index 2)
at async oclifRun (/usr/local/lib/balena-cli/build/app.js:94:5)
at async Object.run (/usr/local/lib/balena-cli/build/app.js:107:9)
at async run (/usr/local/lib/balena-cli/bin/run:20:2)`