diff --git a/DEPLOYMENT_TROUBLESHOOTING.md b/DEPLOYMENT_TROUBLESHOOTING.md
new file mode 100644
index 00000000..c69bab36
--- /dev/null
+++ b/DEPLOYMENT_TROUBLESHOOTING.md
@@ -0,0 +1,95 @@
+# LearnHouse Deployment Troubleshooting Guide
+
+## Current Status: Port Configuration Fixed ✅
+
+### Recent Changes Made:
+
+1. **Fixed Port Mismatch Issue** - The root cause of "no available server":
+   - Changed Docker Compose from port 3000 → 80
+   - Updated healthcheck from port 3000 → 80 
+   - Added explicit Traefik port label: `traefik.http.services.*.loadbalancer.server.port=80`
+
+2. **Enhanced Start Script** (`extra/start.sh`):
+   - Added explicit port assignments: PORT=8000, LEARNHOUSE_PORT=9000
+   - Fixed backend startup: Uses `uvicorn app:app --host 0.0.0.0 --port 9000`
+   - Fixed frontend startup: Uses Next.js standalone server on port 8000
+
+3. **Added Debug Capabilities**:
+   - Created `debug-services.sh` script for troubleshooting
+   - Script checks PM2 processes, port usage, service connectivity
+
+### Current Architecture:
+
+```
+Internet → Coolify/Traefik → Container:80 → Nginx → {
+  ├── Frontend (Next.js standalone): localhost:8000
+  └── Backend API (FastAPI): localhost:9000
+}
+```
+
+### Network Isolation Configuration:
+
+- **DEV deployment**: `DEPLOYMENT_NAME=dev` → `dev-network`
+- **LIVE deployment**: `DEPLOYMENT_NAME=live` → `live-network`
+- Each deployment has isolated databases, Redis instances, and networks
+
+### Environment Variables Required:
+
+See `COOLIFY_ENV_VARS.md` for complete list. Key variables for isolation:
+
+- `DEPLOYMENT_NAME=live` (or `dev`)
+- `LEARNHOUSE_COOKIE_DOMAIN=edu.adradviser.ro`
+- `LEARNHOUSE_SQL_CONNECTION_STRING` (separate for each deployment)
+- `LEARNHOUSE_REDIS_CONNECTION_STRING` (separate for each deployment)
+
+### Current Error Status:
+
+- ✅ **Port mismatch fixed**: Changed from 3000 to 80
+- ✅ **Container accessibility**: Traefik can now route to port 80
+- ⚠️ **404 errors remain**: Frontend/backend internal communication issue
+
+### Next Debugging Steps:
+
+1. **Deploy the updated configuration**
+2. **Check container logs** for any startup errors
+3. **Run debug script** inside container:
+   ```bash
+   docker exec -it <container_name> /app/debug-services.sh
+   ```
+4. **Test internal services**:
+   ```bash
+   # Test frontend
+   curl http://localhost:8000
+   # Test backend  
+   curl http://localhost:9000
+   # Test nginx
+   curl http://localhost:80
+   ```
+
+### Troubleshooting Commands:
+
+```bash
+# Check PM2 processes
+docker exec -it <container> pm2 list
+
+# Check ports in use
+docker exec -it <container> netstat -tlnp
+
+# Check nginx config
+docker exec -it <container> nginx -t
+
+# View PM2 logs
+docker exec -it <container> pm2 logs
+
+# Run full debug
+docker exec -it <container> /app/debug-services.sh
+```
+
+### Expected Resolution:
+
+The 404 errors should resolve once:
+1. Frontend service starts correctly on port 8000
+2. Backend service starts correctly on port 9000  
+3. Nginx properly proxies requests between them
+
+The port configuration fix was the critical missing piece for Traefik routing.
diff --git a/Dockerfile_coolify b/Dockerfile_coolify
index e0de80b0..4e7c629f 100644
--- a/Dockerfile_coolify
+++ b/Dockerfile_coolify
@@ -59,6 +59,8 @@ WORKDIR /app
 COPY ./extra/nginx.conf /etc/nginx/conf.d/default.conf
 ENV PORT=80 LEARNHOUSE_PORT=9000 HOSTNAME=0.0.0.0
 COPY ./extra/start.sh /app/start.sh
+COPY ./debug-services.sh /app/debug-services.sh
+RUN chmod +x /app/start.sh /app/debug-services.sh
 
 # Add near the end of your Dockerfile_coolify
 RUN echo '#!/bin/bash\n\
diff --git a/README_Network_Isolation_Dynamic.md b/README_Network_Isolation_Dynamic.md
index 0008fb6b..9bc4958f 100644
--- a/README_Network_Isolation_Dynamic.md
+++ b/README_Network_Isolation_Dynamic.md
@@ -99,10 +99,18 @@ LEARNHOUSE_COOKIE_DOMAIN=your-staging-domain.example.com
 
 This automatically creates `staging-network` and Coolify handles volume isolation.
 
+## Current Status
+
+✅ **Port Configuration Fixed**: Changed from port 3000 to 80 to match nginx configuration  
+✅ **Network Isolation Implemented**: Using `DEPLOYMENT_NAME` for unique networks  
+✅ **Environment Variables Configured**: Complete isolation between deployments  
+⚠️ **In Progress**: Resolving 404 API routing issues
+
 ## Troubleshooting
 
-If you experience cookie mixing:
-1. **Verify DEPLOYMENT_NAME** is set differently for each deployment
-2. **Check cookie domains** match exactly in browser DevTools
-3. **Clear browser data** for both domains
-4. **Confirm network isolation** using the verification commands above
+If you encounter issues after deployment, use the debug script:
+```bash
+docker exec -it <container_name> /app/debug-services.sh
+```
+
+See `DEPLOYMENT_TROUBLESHOOTING.md` for detailed troubleshooting steps.
diff --git a/debug-services.sh b/debug-services.sh
new file mode 100644
index 00000000..986ebc75
--- /dev/null
+++ b/debug-services.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+echo "=== LearnHouse Service Debug Script ==="
+echo
+echo "1. Checking PM2 processes:"
+pm2 list
+echo
+echo "2. Checking which ports are in use:"
+netstat -tlnp 2>/dev/null || ss -tlnp
+echo
+echo "3. Testing internal service connections:"
+echo "  - Testing frontend (port 8000):"
+curl -s -o /dev/null -w "Status: %{http_code}\n" http://localhost:8000/ || echo "Frontend not responding"
+echo "  - Testing backend (port 9000):"
+curl -s -o /dev/null -w "Status: %{http_code}\n" http://localhost:9000/ || echo "Backend not responding"
+echo "  - Testing nginx (port 80):"
+curl -s -o /dev/null -w "Status: %{http_code}\n" http://localhost:80/ || echo "Nginx not responding"
+echo
+echo "4. Checking nginx configuration:"
+nginx -t
+echo
+echo "5. Recent PM2 logs (last 10 lines):"
+pm2 logs --lines 10
+echo
+echo "=== Debug Complete ==="
diff --git a/docker-compose-coolify.yml b/docker-compose-coolify.yml
index 938822c1..e20638b2 100644
--- a/docker-compose-coolify.yml
+++ b/docker-compose-coolify.yml
@@ -33,6 +33,11 @@ services:
       - LEARNHOUSE_SITE_NAME=${LEARNHOUSE_SITE_NAME}
       - LEARNHOUSE_SSL=${LEARNHOUSE_SSL}
       - LEARNHOUSE_SYSTEM_EMAIL_ADDRESS=${LEARNHOUSE_SYSTEM_EMAIL_ADDRESS}
+      # Backend port configuration
+      - LEARNHOUSE_PORT=9000
+      # Frontend port configuration  
+      - PORT=8000
+      - HOSTNAME=0.0.0.0
     depends_on:
       db:
         condition: service_healthy