> For the complete documentation index, see [llms.txt](https://docs.hivel.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hivel.ai/self-managed-hivel-deployment/virtual-private-cloud/azure/dns-setup-azure/upgrading-from-option-b-to-option-a-and-managing-the-caddy-container.md).
# Upgrading from Option B to Option A and Managing the Caddy Container
DNS Setup (Azure)
### Upgrading from Option B to Option A
Once a domain is available, switch without rebuilding the container:
```
cat > ~/caddy/Caddyfile <<'EOF'
hivel.yourcompany.com {
reverse_proxy localhost:3000
}
EOF
docker restart caddy
```
**Expected result:** Caddy detects the change and automatically requests a **Let's Encrypt certificate** on restart.
### Managing the Caddy Container
```
# View logs
docker logs -f caddy
# Restart (e.g. after editing the Caddyfile)
docker restart caddy
# Stop
docker stop caddy
# Remove entirely (application remains reachable on :3000 directly)
docker rm -f caddy
```
Certificates are stored in the caddy\_data Docker volume and persist across container restarts and upgrades, so renewals happen automatically without re-issuing from scratch.
**Next:** Troubleshooting.
{% columns %}
{% column %} Option B - Self-Signed
{% endcolumn %}
{% column %}
{% endcolumn %}
{% column %} Troubleshooting
{% endcolumn %}
{% endcolumns %}