chore: Update configuration defaults and Docker port handling

- Modify Dockerfile to use dynamic port configuration
- Update Home Assistant host default to use local hostname
- Enhance JWT secret default length requirement
- Remove boilerplate and test setup configuration files

src/api/routes.ts

@@ -115,7 +115,7 @@ router.get("/subscribe_events", middleware.wsRateLimiter, (req, res) => {
     res.writeHead(200, {
       "Content-Type": "text/event-stream",
       "Cache-Control": "no-cache",
-      Connection: "keep-alive",
+      "Connection": "keep-alive",
       "Access-Control-Allow-Origin": "*",
     });