Resolve "Add RabbitMQ for MessageBus triggers"

Closes #1 (closed)

\approve @ds @gislars

Dockerfile

@@ -14,4 +14,4 @@ RUN apt-get update \
   && apt-get clean \
   && rm -rf /var/lib/apt/lists/*
 RUN pip install pgxnclient
-RUN pgxnclient install pg_amqp
+RUN pgxnclient install pg_amqp -I /usr/include/postgresql/13/server/postgres.h