Setting up slack signing secret and bot token

$ firebase functions:config:set slack.signingsecret="SIGNING_SECRET"
$ firebase functions:config:set slack.bottoken="BOT_OAUTH_TOKEN"

Setting up slack channel for new links notifications

$ firebase functions:config:set foxy.channel-tech="CHANNEL"
$ firebase functions:config:set foxy.channel-biz="CHANNEL"

Setting up webapp url for slack notifications

$ firebase functions:config:set webapp.url="WEBAPP_URL"