test: add install.sh docker e2e smoke

scripts/docker/install-sh-smoke/Dockerfile

@@ -0,0 +1,14 @@
+FROM node:22-bookworm-slim
+
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends \
+    bash \
+    ca-certificates \
+    curl \
+    git \
+  && rm -rf /var/lib/apt/lists/*
+
+COPY run.sh /usr/local/bin/clawdbot-install-smoke
+RUN chmod +x /usr/local/bin/clawdbot-install-smoke
+
+ENTRYPOINT ["/usr/local/bin/clawdbot-install-smoke"]

scripts/docker/install-sh-smoke/run.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+INSTALL_URL="${CLAWDBOT_INSTALL_URL:-https://clawd.bot/install.sh}"
+
+echo "==> Resolve npm versions"
+LATEST_VERSION="$(npm view clawdbot version)"
+PREVIOUS_VERSION="$(node - <<'NODE'
+const { execSync } = require("node:child_process");
+
+const versions = JSON.parse(execSync("npm view clawdbot versions --json", { encoding: "utf8" }));
+if (!Array.isArray(versions) || versions.length === 0) {
+  process.exit(1);
+}
+const previous = versions.length >= 2 ? versions[versions.length - 2] : versions[0];
+process.stdout.write(previous);
+NODE
+)"
+
+echo "latest=$LATEST_VERSION previous=$PREVIOUS_VERSION"
+
+echo "==> Preinstall previous (forces installer upgrade path)"
+npm install -g "clawdbot@${PREVIOUS_VERSION}"
+
+echo "==> Run official installer one-liner"
+curl -fsSL "$INSTALL_URL" | bash
+
+echo "==> Verify installed version"
+INSTALLED_VERSION="$(clawdbot --version 2>/dev/null | head -n 1 | tr -d '\r')"
+echo "installed=$INSTALLED_VERSION expected=$LATEST_VERSION"
+
+if [[ "$INSTALLED_VERSION" != "$LATEST_VERSION" ]]; then
+  echo "ERROR: expected clawdbot@$LATEST_VERSION, got clawdbot@$INSTALLED_VERSION" >&2
+  exit 1
+fi
+
+echo "==> Sanity: CLI runs"
+clawdbot --help >/dev/null
+
+echo "OK"