chore(docker): downgrade Node.js from 22 to 20

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: nicomiguelino

docker/nodejs-install.j2

@@ -8,6 +8,6 @@ RUN apt-get update && \
     apt-get -y install \
         curl \
         ca-certificates && \
-    curl -fsSL https://deb.nodesource.com/setup_22.x | bash - && \
+    curl -fsSL https://deb.nodesource.com/setup_20.x | bash - && \
     apt-get -y install nodejs
 {% endif %}