Allow setting up wifi from config

Add WPA_ESSID, WPA_PASSWORD and WPA_COUNTRY options to config.

1 files changed, 4 insertions, 0 deletions

diff --git a/README.md b/README.md
index 8af1f12..02db69d 100755
--- a/README.md
+++ b/README.md
@@ -81,6 +81,10 @@ The following environment variables are supported:
 
    Password for the first user
 
+ * `WPA_ESSID`, `WPA_PASSWORD` and `WPA_COUNTRY` (Default: unset)
+
+   If these are set, they are use to configure `wpa_supplicant.conf`, so that the raspberry pi can automatically connect to a wifi network on first boot.
+
 A simple example for building Raspbian:
 
 ```bash