Update documentation

Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>

README.md

@@ -42,7 +42,7 @@ that are split across multiple *layers*.
 
 From the product name, a layer configuration file in the `product` sub
 directory is read, specifying what configuration layers to use and in
-whate order (later layers can override earlier layers).
+what order (later layers can override earlier layers).
 
 The actual configuration for the build system is in the coresponding sub
 directories in `layer/<name>`.
@@ -65,7 +65,9 @@ The system currently contains configurations for the following products:
    and packets from the first two are NAT translated and forwarded. The two
    ports have different IP subnets and are not allowed to talk to each other.
    A local SSH server can be reached via the first two ports. A user has to
-   be added first, since root login is disabled.
+   be added first, since root login is disabled. A local Nginx web server
+   can be reached via the first two ports that serves a simple demo landing
+   page.
 
  - `router-rpi3` - A Raspberry Pi 3 based wireless access point (32 bit ARM).
    A DHPC server serves IP addresses and configures the board as default
@@ -73,6 +75,8 @@ The system currently contains configurations for the following products:
    resolver. The ethernet interface is configured via DHCP and packets
    are NAT translated and forwarded. A local SSH server can be reached on the
    WLAN interface. A user has to be added first, since root login is disabled.
+   A local Nginx web server can be reached on the WLAN interface that serves
+   a simple demo landing page.
 
 
 ## How to build the system

docs/build.md

@@ -210,6 +210,8 @@ Currently, the following variables are used:
 * `LINUX_TGT` contains the space seperated make targets for the generic,
   main line, LTS kernel package.
 * `OPENSSL_TARGET` contains the target architecture for the OpenSSL package.
+* `CPU_IS_64BIT` is set to `yes` for 64 bit CPUs. This is needed for some
+  packages like nginx that need a little help for cross compiling.
 
 
 ### Init System Configuration
@@ -259,3 +261,4 @@ The following files are currently used (with default override behavior):
 * `dnsmasq.conf` is installed to `/etc` by the dnsmasq package.
 * `unbound.conf` is installed to `/etc` by the unbound package.
 * `dhcpcd.conf` is installed to `/etc` by the dhcpcd package.
+* `nginx.conf` is installed to `/etc/nginx` by the nginx package.

docs/layers.md

@@ -69,9 +69,9 @@ layers.
 ### Product Specific Layers
 
  - `router-base` contains basic configuration for the router class of products.
-   It adds `unbound`, `dnsmasq`, `openssh` and `tcpdump`. The kernel parameters
-   are configured to enable IP forwarding, `resolv.conf` is set to resolve
-   names through the local DNS resolver.
+   It adds `unbound`, `dnsmasq`, `openssh`, `nginx` and `tcpdump`. The kernel
+   parameters are configured to enable IP forwarding, `resolv.conf` is set to
+   resolve names through the local DNS resolver.
 
  - `router-alix` extends `router-base` with interface configuration for the
    ALIX board and appropriate nftable rules.