Package Conduit Market as an Archipelago app

Pure client-side Nostr+Lightning marketplace (apps/market from
Conduit-BTC/conduit-mono) built into a static nginx image. Public/private
is a genuine runtime toggle, not two separate builds: Vite bakes VITE_*
relay config into the bundle at build time, so config.ts is patched
(apply-runtime-override.py) to merge in a window.__CONDUIT_RUNTIME_ENV__
override written by docker-entrypoint.sh from CONDUIT_MODE /
CONDUIT_PRIVATE_RELAY_URLS at container start -- flipping mode only needs
a restart, not a rebuild. Verified end-to-end: build succeeds, the
override survives bundling/minification, and public/private/missing-relay
all produce the correct runtime-env.js (private with no relay URL refuses
to start rather than silently falling back to the public network).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docker/conduit-market/apply-runtime-override.py

@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+"""Patches packages/core/src/config.ts so it can be reconfigured
+public/private at container-start time instead of only at build time.
+
+Vite bakes VITE_* env vars into the bundle as literal strings when it
+compiles (import.meta.env.VITE_FOO is a static replacement, not a runtime
+lookup) -- confirmed directly in config.ts's own comment on getViteEnv().
+That means a container image built once can never be flipped between an
+isolated private relay and the public Conduit network via ordinary env
+vars after the fact; the values are frozen into the compiled JS.
+
+This packaging needs exactly that live toggle, so docker-entrypoint.sh
+writes a small /runtime-env.js at *container start* (from real env vars)
+setting window.__CONDUIT_RUNTIME_ENV__ before the app bundle runs. This
+script inserts one small override function right before the single call
+site that consumes getViteEnv()'s result (`const env = getViteEnv()`,
+confirmed to be the only call site in the file and to run once at module
+load), so only that one merge point needs to change. Only non-empty
+string fields override the Vite-baked default; a build with no runtime
+override behaves identically to stock upstream Conduit.
+
+Uses a literal string anchor rather than a line-numbered diff/patch --
+more robust against upstream reformatting a comment or reflowing
+unrelated lines than a traditional unified diff would be.
+"""
+import sys
+
+CONFIG_PATH = "packages/core/src/config.ts"
+ANCHOR = "const env = getViteEnv()"
+
+OVERRIDE_BLOCK = '''// --- Archipelago runtime relay override -------------------------------------
+// See docker/conduit-market/apply-runtime-override.py in the archy repo for
+// why this exists: Vite bakes VITE_* env vars into the bundle at build
+// time, so a container image built once can never be reconfigured
+// public/private afterward via ordinary env vars. docker-entrypoint.sh
+// writes window.__CONDUIT_RUNTIME_ENV__ from real environment variables at
+// container start, before this bundle runs.
+function getRuntimeOverrides(): Partial<ReturnType<typeof getViteEnv>> {
+  if (typeof window === "undefined") return {}
+  const raw = (window as unknown as Record<string, unknown>)
+    .__CONDUIT_RUNTIME_ENV__
+  if (!raw || typeof raw !== "object") return {}
+  const out: Record<string, string> = {}
+  for (const [key, value] of Object.entries(raw as Record<string, unknown>)) {
+    if (typeof value === "string" && value.length > 0) out[key] = value
+  }
+  return out as Partial<ReturnType<typeof getViteEnv>>
+}
+
+const env = { ...getViteEnv(), ...getRuntimeOverrides() }'''
+
+with open(CONFIG_PATH) as f:
+    content = f.read()
+
+count = content.count(ANCHOR)
+if count != 1:
+    print(
+        f"FATAL: expected exactly 1 occurrence of anchor line in {CONFIG_PATH}, "
+        f"found {count}. Upstream config.ts has likely changed in a way that "
+        "needs this script re-checked by hand before it can safely patch it.",
+        file=sys.stderr,
+    )
+    sys.exit(1)
+
+content = content.replace(ANCHOR, OVERRIDE_BLOCK, 1)
+
+with open(CONFIG_PATH, "w") as f:
+    f.write(content)
+
+print(f"Patched {CONFIG_PATH}: runtime relay override installed.")