Documentation: Configuration in README

[andys8]

The configuration of haskell-language-server is currently not documented in the README.md.

haskell-language-server/src/Ide/Plugin/Config.hs

Lines 44 to 54 in bda4058

	data Config =
	Config
	{ hlintOn :: Bool
	, diagnosticsOnChange :: Bool
	, maxNumberOfProblems :: Int
	, diagnosticsDebounceDuration :: Int
	, liquidOn :: Bool
	, completionSnippetsOn :: Bool
	, formatOnImportOn :: Bool
	, formattingProvider :: T.Text
	} deriving (Show,Eq)

See documentation of configuration in haskell-ide-engine for comparison.

[lukel97]

As far as I'm aware, the only one of these config settings that has any effect is formattingProvider

[andys8]

Oh, didn't know. So, adding only formattingProvider to the docs could help avoid confusion.

[jneira]

A configuration section was added after this issue: https://github.com/haskell/haskell-language-server#language-specific-server-options
It mentions the actual working options, @andys8 please reopen this (or open a new issue) if you miss something in the actual version