feat: Remove Caddy and Docker configuration; add Express server with health checker endpoint

server.js

@@ -0,0 +1,24 @@
+const express = require("express");
+const path = require("path");
+
+const app = express();
+const port = process.env.PORT || 3000;
+const rootDir = path.join(__dirname);
+
+// Serve static assets from the project root
+app.use(express.static(rootDir, { index: "index.html" }));
+
+// Health checker should always return the raw script with text/plain
+app.get("/healthchecker", (req, res) => {
+  res.type("text/plain");
+  res.sendFile(path.join(rootDir, "health_checker"));
+});
+
+// Fallback to index.html for other routes (optional)
+app.get("*", (req, res) => {
+  res.sendFile(path.join(rootDir, "index.html"));
+});
+
+app.listen(port, () => {
+  console.log(`Soul:23 server listening on port ${port}`);
+});