init: SNEK on Kubernetes

- Dockerfile: Ubuntu 20.04 + all SNEK dependencies (libgtk2-perl, libffi6, etc.)
- entrypoint.sh: flash firmware via foxctl, start main_sigfox
- deploy/snek.yaml: K8s manifest (namespace, PVC, deployment, LoadBalancer)
- README: full documentation covering hardware, software, decoding, callbacks

build/entrypoint.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+set -e
+
+echo "==> Sigfox Network Emulator container starting"
+echo "==> Detecting Sigfox dongle..."
+
+if lsusb | grep -iE "2cc1"; then
+    echo "==> Dongle detected"
+else
+    echo "!!! WARNING: no Sigfox dongle detected on /dev/bus/usb"
+    echo "!!! Make sure the container has: privileged: true AND /dev/bus/usb mounted"
+fi
+
+echo "==> Flashing firmware (foxctl)..."
+cd /opt/snek
+./foxctl || echo "foxctl RC=$? (may be normal if firmware already loaded)"
+sleep 2
+
+echo "==> Starting SNEK main_sigfox on port 8085..."
+exec ./main_sigfox