Handle envirement var in alertmanager/config.yml

[KoVaLsKy2010]

handle envirement vars *.yml files dose not handle envirement from docker

Environment

• Alertmanager configuration file NOW:

  receivers:
    - name: 'telegram'
      telegram_configs:
        - send_resolved: true
          api_url: 'https://api.telegram.org'
          bot_token: '123456:ASDFGH-:LKHHGFGD-WERWERWER'
          chat_id: 12345
          parse_mode: 'Markdown'

  For example

  receivers:
    - name: 'telegram'
      telegram_configs:
        - send_resolved: true
          api_url: 'https://api.telegram.org'
          bot_token: ${TELEGRAM_TOKEN}
          chat_id: ${TELEGRAM_ADMIN}
          parse_mode: 'Markdown'

  docker-compose.yml

alertmanager:
        image: prom/alertmanager
        ports:
            - 9093:9093
        environment:
            - TELEGRAM_ADMIN=12345
            - TELEGRAM_TOKEN='123456:ASDFGH-:LKHHGFGD-WERWERWER'

[splitt3r]

Duplicate of https://github.com/prometheus/alertmanager/issues/504

https://github.com/prometheus/alertmanager/issues/2498 tries to solve the problem with secret files