Archipelago — open-source initial import

docker/mempool-frontend/Dockerfile

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+# Archipelago mempool frontend — adds a resilient nginx backend proxy.
+#
+# The only delta vs the upstream image is /patch/entrypoint.sh, which rewrites
+# the generated nginx-mempool.conf to use `resolver` + a variable proxy_pass so
+# the frontend re-resolves the backend (mempool-api) via DNS on every request.
+# Without this, nginx pins the backend IP at startup and serves 502 / "offline"
+# after any backend restart (podman reassigns the IP). See the script header.
+ARG BASE=source.archipelago-foundation.org/lfg2025/mempool-frontend:v3.0.0
+FROM ${BASE}
+
+# --chmod keeps the exec bit (build runs as USER 1000, plain COPY lands root:0644
+# → "not executable"). Base USER/ENTRYPOINT/CMD (1000 / /patch/entrypoint.sh /
+# nginx -g "daemon off;") are inherited unchanged.
+COPY --chmod=0755 entrypoint.sh /patch/entrypoint.sh