feat: add health check support

Author: ahze

15/Containerfile

@@ -46,6 +46,6 @@ RUN mkdir -p /etc/cont-init.d \
     /run/s6/services
 
 # Make scripts executable
-RUN chmod +x /init /etc/cont-init.d/* 2>/dev/null || true
+RUN chmod +x /init /healthz /etc/cont-init.d/* 2>/dev/null || true
 
 ENTRYPOINT ["/init"]

15/root/healthz

@@ -0,0 +1,13 @@
+#!/bin/sh
+# Generic health check - uses HEALTHCHECK_URL env var
+# Override by placing custom /healthz in image's root/
+
+URL="${HEALTHCHECK_URL:-}"
+TIMEOUT="${HEALTHCHECK_TIMEOUT:-5}"
+
+if [ -z "$URL" ]; then
+    echo "HEALTHCHECK_URL not set" >&2
+    exit 1
+fi
+
+exec fetch -qo /dev/null -T "$TIMEOUT" "$URL"