Add network config (Netplan, Caddy) to installation guide

Agap-Installation.md

@@ -2,14 +2,59 @@
 
 Steps to set up a fresh Agap server from scratch.
 
-## 1. GPU & Docker
+## 1. Network
+
+### Netplan (bridge)
+
+Edit `/etc/netplan/50-cloud-init.yaml`:
+
+```yaml
+network:
+  bridges:
+    br0:
+      interfaces: [enp4s0]
+      dhcp4: true
+  version: 2
+```
+
+```bash
+sudo netplan apply
+```
+
+> MAC address changes after bridge setup — router may assign a new IP.
+> Interface name (`enp4s0`) may differ after hardware changes — check with `ip link show`.
+
+### Caddy (reverse proxy)
+
+[Install Caddy](https://caddyserver.com/docs/install#debian-ubuntu-raspbian), then configure `/etc/caddy/Caddyfile`:
+
+```
+haos.alogins.net  { reverse_proxy http://192.168.1.141:8123 }
+vi.alogins.net    { reverse_proxy localhost:2283 }
+zb.alogins.net    { reverse_proxy localhost:81 }
+git.alogins.net   { reverse_proxy localhost:3000 }
+ai.alogins.net    { reverse_proxy localhost:3125 }
+ntfy.alogins.net  { reverse_proxy localhost:8840 }
+```
+
+(See `/etc/caddy/Caddyfile` for full config including VPN and other services.)
+
+```bash
+sudo systemctl enable --now caddy
+```
+
+**Requirements:**
+- Ports **80** and **443** forwarded on the router (source and target, remote IP empty)
+- Port **10051** forwarded for Zabbix active agent connections
+
+## 2. GPU & Docker
 
 ```bash
 sudo ./nvidia-docker-install.sh   # Docker + NVIDIA Container Toolkit
 ./install-cuda.sh                  # CUDA toolkit (no driver)
 ```
 
-## 2. Zabbix Agent (host)
+## 3. Zabbix Agent (host)
 
 Install agent and plugins:
 
@@ -43,7 +88,7 @@ In Zabbix UI, link these templates to the `AgapHost` host:
 - **Linux by Zabbix agent active**
 - **Nvidia by Zabbix agent 2 active**
 
-## 3. Custom Zabbix UserParameters
+## 4. Custom Zabbix UserParameters
 
 Add backup monitoring to `/etc/zabbix/zabbix_agent2.d/gitea_backup.conf`:
 
@@ -59,7 +104,7 @@ UserParameter=dbs.backup.age,f=/mnt/backups/dbs/.last_sync; [ -f "$f" ] && echo
 UserParameter=immich.backup.age,f=/mnt/backups/media/.last_sync; [ -f "$f" ] && echo $(( $(date +%s) - $(stat -c %Y "$f") )) || echo -1
 ```
 
-## 4. Root Cron Jobs
+## 5. Root Cron Jobs
 
 ```bash
 sudo crontab -e
@@ -72,7 +117,7 @@ Add:
 30 3 * * * rsync -a --delete /mnt/ssd/dbs/ /mnt/backups/dbs/ >> /mnt/backups/dbs/cron.log 2>&1 && touch /mnt/backups/dbs/.last_sync
 ```
 
-## 5. Services
+## 6. Services
 
 Start all Docker services: