fix nftables rules

Dockerfile

@@ -34,6 +34,7 @@ RUN apk add --no-cache \
     dumb-init \
     iptables \
     ip6tables \
+    nftables \
     kmod \
     iptables-legacy \
     wireguard-tools

docs/content/examples/tutorials/podman-nft.md

@@ -2,11 +2,6 @@
 title: Podman + nftables
 ---
 
-/// warning | Not working yet
-
-There are some problems with nftables currently. You can use the Quadlet files anyway
-///
-
 This guide will show you how to run `wg-easy` with rootful Podman and nftables.
 
 ## Requirements
@@ -93,7 +88,7 @@ In the Admin Panel of your WireGuard server, go to the `Hooks` tab and add the f
 1. PostUp
 
    ```shell
-   apk add nftables; nft add table inet wg_table; nft add chain inet wg_table postrouting { type nat hook postrouting priority 100 \; }; nft add rule inet wg_table postrouting ip saddr {{ipv4Cidr}} oifname {{device}} masquerade; nft add rule inet wg_table postrouting ip6 saddr {{ipv6Cidr}} oifname {{device}} masquerade; nft add chain inet wg_table input { type filter hook input priority 0 \; policy accept \; }; nft add rule inet wg_table input udp dport {{port}} accept; nft add rule inet wg_table input tcp dport {{uiPort}} accept; nft add chain inet wg_table forward { type filter hook forward priority 0 \; policy accept \; }; nft add rule inet wg_table forward iifname "wg0" accept; nft add rule inet wg_table forward oifname "wg0" accept;
+   nft add table inet wg_table; nft add chain inet wg_table prerouting { type nat hook prerouting priority 100 \; }; nft add chain inet wg_table postrouting { type nat hook postrouting priority 100 \; }; nft add rule inet wg_table postrouting ip saddr {{ipv4Cidr}} oifname {{device}} masquerade; nft add rule inet wg_table postrouting ip6 saddr {{ipv6Cidr}} oifname {{device}} masquerade; nft add chain inet wg_table input { type filter hook input priority 0 \; policy accept \; }; nft add rule inet wg_table input udp dport {{port}} accept; nft add rule inet wg_table input tcp dport {{uiPort}} accept; nft add chain inet wg_table forward { type filter hook forward priority 0 \; policy accept \; }; nft add rule inet wg_table forward iifname "wg0" accept; nft add rule inet wg_table forward oifname "wg0" accept;
    ```
 
 2. PostDown