Update CI

docker/buildx/Dockerfile

@@ -1,3 +1,4 @@
+FROM node:22-alpine AS node
 FROM docker:git
 
 RUN set -ex; \
@@ -5,7 +6,22 @@ RUN set -ex; \
   make \
   curl \
   bash \
-  jq  ;
+  jq \
+  libstdc++ ;
+
+# Copy Node.js 22 from official image
+COPY --from=node /usr/lib /usr/lib
+COPY --from=node /usr/local/lib /usr/local/lib
+COPY --from=node /usr/local/include /usr/local/include
+COPY --from=node /usr/local/bin /usr/local/bin
+
+# Prepare pnpm (corepack is already enabled in node:22-alpine)
+RUN corepack prepare pnpm@9.15.4 --activate
+
+# Set up pnpm home
+ENV PNPM_HOME="/pnpm"
+ENV PATH="$PNPM_HOME:$PATH"
+
 COPY --from=docker/buildx-bin /buildx /usr/libexec/docker/cli-plugins/docker-buildx
 RUN docker buildx install
 RUN docker buildx version