fix: correct CMD syntax in Dockerfile

Remove extraneous character from CMD instruction in Dockerfile to 
ensure proper execution of the start script. This change fixes 
the command syntax and improves the reliability of the Docker 
container startup process.

Dockerfile

@@ -29,4 +29,4 @@ ENV NODE_ENV=production
 EXPOSE 3000
 
 # Run the app with the start script
-CMD ["npm", "start"]s
+CMD ["npm", "start"]