LSP working for Vimscript

backend/src/langs.ts

@@ -1092,6 +1092,7 @@ END
     repl: "vim",
     main: "main.vim",
     run: `vim -c "$(< main.vim)"`,
+    lsp: "vim-language-server --stdio",
     template: `:echo "Hello, world!"
 `,
   },

scripts/docker-install-phase4.bash

@@ -73,6 +73,9 @@ luarocks install digestif
 # TypeScript
 npm install -g ts-node typescript
 
+# Vim
+npm install -g vim-language-server
+
 # Whitespace
 pip3 install whitespace