try specifying an older phusion/passenger image?

Dockerfile

@@ -1,4 +1,4 @@
-FROM phusion/passenger-ruby30
+FROM phusion/passenger-ruby30:2.5.1
 RUN apt-get update && apt-get upgrade -y -o Dpkg::Options::="--force-confold"
 
 RUN rm -f /etc/service/nginx/down
@@ -8,7 +8,7 @@ ADD hourglass.conf /etc/nginx/sites-enabled/hourglass.conf
 RUN apt-get update
 RUN apt-get install -y ca-certificates curl gnupg
 RUN mkdir -p /etc/apt/keyrings
-# RUN curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg
+RUN curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg
 ENV NODE_MAJOR=20
 RUN echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list
 RUN apt-get update -qq && apt-get install -y nodejs postgresql-client