[docgen] Update CONFIG.md

skip-checks: true

1 files changed, 40 insertions, 0 deletions

diff --git a/CONFIG.md b/CONFIG.md
index 74b193e6..d1e05bc6 100644
--- a/CONFIG.md
+++ b/CONFIG.md
@@ -22,6 +22,7 @@ that config.
 - [elmls](#elmls)
 - [flow](#flow)
 - [fortls](#fortls)
+- [fsautocomplete](#fsautocomplete)
 - [gdscript](#gdscript)
 - [ghcide](#ghcide)
 - [gopls](#gopls)
@@ -1470,6 +1471,45 @@ require'lspconfig'.fortls.setup{}
     }
 ```
 
+## fsautocomplete
+
+https://github.com/fsharp/FsAutoComplete
+
+Language Server for F# provded by FsAutoComplete (FSAC).
+
+Download a release of FsAutoComplete from [here](https://github.com/fsharp/FsAutoComplete/releases).
+Instructions to compile from source are found on the main repository.
+
+FsAutoComplete requires the [dotnet-sdk](https://dotnet.microsoft.com/download) to be installed.
+
+You may also need to configure the filetype as Vim defaults to Forth for `*.fs` files:
+
+`autocmd BufNewFile,BufRead *.fs,*.fsx,*.fsi set filetype=fsharp`
+
+This is automatically done by plugins such as [vim-polyglot](https://github.com/sheerun/vim-polyglot), [PhilT/vim-fsharp](https://github.com/PhilT/vim-fsharp) or [fsharp/vim-fsharp](https://github.com/fsharp/vim-fsharp).
+
+**By default, this config doesn't have a `cmd` set.** This is because nvim-lspconfig does not make assumptions about your path. You must add the following to your init.vim or init.lua to set `cmd` to the absolute path ($HOME and ~ are not expanded) of your unzipped and compiled fsautocomplete.dll.
+
+```lua
+require'lspconfig'.fsautocomplete.setup{
+  cmd = {'dotnet', 'path/to/fsautocomplete.dll', '--background-service-enabled'}
+}
+```
+    
+
+```lua
+require'lspconfig'.fsautocomplete.setup{}
+
+  Commands:
+  
+  Default Values:
+    filetypes = { "fsharp" }
+    init_options = {
+      AutomaticWorkspaceInit = true
+    }
+    root_dir = <function 1>
+```
+
 ## gdscript
 
 https://github.com/godotengine/godot