Changes to be committed:

new file:   .gitignore

.gitignore

@@ -0,0 +1,2 @@
+.vscode/
+dist-newstyle/

app/Main.hs

@@ -1,4 +1,16 @@
 module Main where
 
+import Brick (Widget, simpleMain, (<+>), str, withBorderStyle, joinBorders)
+import Brick.Widgets.Center (center)
+import Brick.Widgets.Border (borderWithLabel, vBorder)
+import Brick.Widgets.Border.Style (unicode)
+
+ui :: Widget ()
+ui =
+    newForm $
+    joinBorders $
+    withBorderStyle unicode $
+    borderWithLabel (str "Hello!")
+
 main :: IO ()
-main = putStrLn "Hello, Haskell!"
+main = simpleMain ui

freedoc.cabal

@@ -64,6 +64,7 @@ executable freedoc
     -- .hs or .lhs file containing the Main module.
     main-is:          Main.hs
 
+    ghc-options: -threaded -rtsopts -with-rtsopts=-N
     -- Modules included in this executable, other than Main.
     -- other-modules:
 
@@ -73,7 +74,9 @@ executable freedoc
     -- Other library packages from which modules are imported.
     build-depends:
         base ^>=4.17.2.1,
-        brick >= 2.4
+        brick >= 2.4,
+        vty >= 6.0,
+        vty-crossplatform >= 0.4.0.0
 
     -- Directories containing source files.
     hs-source-dirs:   app