Initial StartOS 0.3.5.1 packaging scaffold for Kamado Pool

Multi-stage Dockerfile clones KamadoPool at a pinned SHA, builds
ckpool and kamado-api (with embedded Svelte UI), runtime image
supervises both processes via tini + wait -n. Config covers
bitcoind mainnet/testnet4 variant, payout address, coinbase tag,
vardiff knobs, and log level. Web UI interface only — stratum
:3333 requires a router port-forward or simpleproxy workaround
because StartOS 0.3.x does not forward raw TCP on LAN.

TODO before first build: pin KAMADO_REPO + KAMADO_SHA in the
Dockerfile to a pushed commit.

scripts/procedures/healthChecks.ts

@@ -0,0 +1,10 @@
+import { healthUtil, types as T } from "../deps.ts";
+
+export const health: T.ExpectedExports.health = {
+  "web": async (effects, duration) => {
+    return healthUtil.checkWebUrl("http://kamado-pool.embassy:8080/api/health")(
+      effects,
+      duration,
+    );
+  },
+};