docs: describe docker setup and configuration - #1171

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Updating targeted paths:
  en/self-host/deploy/quick-start/docker-compose.mdx
  ja/self-host/deploy/quick-start/docker-compose.mdx
  zh/self-host/deploy/quick-start/docker-compose.mdx
  en/self-host/deploy/configuration/environments.mdx
  ja/self-host/deploy/configuration/environments.mdx
  zh/self-host/deploy/configuration/environments.mdx
  en/self-host/use-dify/build/new-agent/build.mdx
  ja/self-host/use-dify/build/new-agent/build.mdx
  zh/self-host/use-dify/build/new-agent/build.mdx
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