Initial project skeleton

Haskell backend: Orb HTTP framework, JSON-only API
Frontend: Mithril.js SPA with TypeScript, Neo Brutalism CSS
Dockerized build via flipstone/haskell-tools image

Routes:
  GET /api/health — health check

Build: ./hs stack build
Test:  ./hs stack test
Run:   ./scripts/run

app/Main.hs

@@ -0,0 +1,53 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+{- | Entry point for the Sis chore tracker server.
+
+Starts a Warp HTTP server and serves the JSON API.
+-}
+module Main (main) where
+
+import Network.Wai.Handler.Warp qualified as Warp
+import Options.Applicative qualified as Opt
+import System.Posix.Signals qualified as Signals
+
+import Sis.Server qualified as Sis
+
+data Options = Options
+  { optPort :: Int
+  }
+
+optionsParser :: Opt.Parser Options
+optionsParser =
+  Options
+    <$> Opt.option
+      Opt.auto
+      ( Opt.long "port"
+          <> Opt.short 'p'
+          <> Opt.metavar "PORT"
+          <> Opt.help "Listen port"
+          <> Opt.value 8080
+          <> Opt.showDefault
+      )
+
+main :: IO ()
+main = do
+  opts <- Opt.execParser $
+    Opt.info (optionsParser Opt.<**> Opt.helper) $
+      Opt.fullDesc
+        <> Opt.progDesc "Sis — shared household chore tracker"
+        <> Opt.header "sis-server"
+
+  -- Install a SIGTERM handler so Docker stop works cleanly.
+  _ <- Signals.installHandler
+    Signals.sigTERM
+    (Signals.Catch (putStrLn "[sis] shutting down"))
+    Nothing
+
+  let waiApp = Sis.app
+
+  let settings =
+        Warp.setPort (optPort opts)
+          $ Warp.setBeforeMainLoop (putStrLn $ "[sis] listening on port " ++ show (optPort opts))
+          Warp.defaultSettings
+
+  Warp.runSettings settings waiApp