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What is the Traefik file provider?
The file provider lets you define Traefik's dynamic configuration (routers, services, middlewares, TLS options) directly in a YAML or TOML file, rather than pulling it from an orchestrator.
It's commonly used for static backends that don't live in Docker or Kubernetes, or for defining reusable middleware and TLS options that get referenced by resources coming from other providers.
When the watch option is enabled, Traefik reloads the file automatically on changes, applying the new configuration without downtime.
It also supports splitting configuration across multiple files or a whole directory, which many teams use to keep a shared set of middleware and TLS option definitions separate from the routers each individual provider produces.
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