big update based on real wokr

rig/ctrl/docs.sh

@@ -16,12 +16,30 @@ serve() {
         echo "no docs/index.html" >&2
         exit 1
     fi
+    # One worker and no access log: a few static pages need no more, and the
+    # terminal then shows only real errors. The config is a temp file, gone on exit.
+    # Global, not local: the trap runs after serve() has returned.
+    DOCS_CONF=$(mktemp)
+    trap 'rm -f "$DOCS_CONF"' EXIT
+    cat > "$DOCS_CONF" <<'NGINX'
+worker_processes 1;
+error_log stderr error;
+events { worker_connections 64; }
+http {
+    include /etc/nginx/mime.types;
+    access_log off;
+    server { listen 80; root /usr/share/nginx/html; }
+}
+NGINX
+    chmod 644 "$DOCS_CONF"
     echo "docs for '$CLUSTER' on http://localhost:${DOCS_PORT}"
     echo "  (ctrl-c to stop; nothing is installed and nothing persists)"
     docker run --rm \
         --name "${CLUSTER}-docs" \
+        -e NGINX_ENTRYPOINT_QUIET_LOGS=1 \
         -p "${DOCS_PORT}:80" \
         -v "$REPO/docs:/usr/share/nginx/html:ro" \
+        -v "$DOCS_CONF:/etc/nginx/nginx.conf:ro" \
         nginx:alpine
 }