feat: integrate tasks/cron server into custom Next.js server

- Add tasks dependencies (fastify, cron-job-api, cron-jobs, etc.) to nextjs app
- Import and start tasks (JobManager, jobGroup, Fastify cron API) in server.ts
- Update root package.json start script to remove tasks.cjs
- Update scripts/run.sh to run single process
- Update Dockerfile to not copy tasks.cjs
- Disable tasks dev script (no-op)

Co-authored-by: ajnart <49837342+ajnart@users.noreply.github.com>

scripts/run.sh

@@ -45,17 +45,14 @@ fi
 
 
 
-node apps/tasks/tasks.cjs &
-TASKS_PID=$!
-
-# WebSocket server is now integrated into the custom Next.js server
+# Tasks/cron and WebSocket servers are now integrated into the custom Next.js server
 node apps/nextjs/customServer.cjs &
 NEXTJS_PID=$!
 
 # Function to handle SIGTERM and shut down services
 terminate() {
     echo "Received SIGTERM. Shutting down..."
-    kill -TERM $NGINX_PID $TASKS_PID $NEXTJS_PID 2>/dev/null
+    kill -TERM $NGINX_PID $NEXTJS_PID 2>/dev/null
     wait
     # kill redis-server last because of logging of other services and only if $REDIS_PID is set
     if [ -n "$REDIS_PID" ]; then