stage for external build

Dockerfile

@@ -0,0 +1,19 @@
+FROM node:20-bullseye-slim
+
+# Add Docker's official GPG key:
+RUN apt update
+RUN apt -y install ca-certificates curl
+RUN install -m 0755 -d /etc/apt/keyrings
+RUN curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
+RUN chmod a+r /etc/apt/keyrings/docker.asc
+
+# Add the repository to Apt sources:
+RUN echo \
+  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
+  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
+   tee /etc/apt/sources.list.d/docker.list > /dev/null
+RUN apt-get update
+
+RUN apt install -y docker-ce-cli docker-buildx-plugin docker-compose-plugin
+
+# FIXME install just