Add Patroni updates for static_single_node support

Dockerfile

@@ -143,7 +143,7 @@ RUN for postgisv in ${POSTGIS_VERSIONS}; do \
 # Patroni and Spilo Dependencies
 # This need to be done after the PostgreSQL packages have been installed,
 # to ensure we have the preferred libpq installations etc.
-RUN apt-get install -y patroni
+RUN apt-get install -y patroni=2.1.3-2
 
 RUN for file in $(find /usr/share/postgresql -name 'postgresql.conf.sample'); do \
         # We want timescaledb to be loaded in this image by every created cluster
@@ -453,6 +453,11 @@ RUN rm /etc/pgbackrest.conf && ln -s "${PGBACKREST_CONFIG}" /etc/pgbackrest.conf
 ## to make this work nicely, they need to exist though
 RUN for i in $(seq 0 7); do touch "${PGLOG}/postgresql-$i.log" "${PGLOG}/postgresql-$i.csv"; done
 
+## Patch Patroni code with changes from https://github.com/timescale/patroni/pull/1
+## This is a temporary solution until changes land upstream.
+RUN wget -qO- https://raw.githubusercontent.com/timescale/patroni/v2.2.0-beta.0/patroni/ha.py > /usr/lib/python3/dist-packages/patroni/ha.py && \
+    wget -qO- https://raw.githubusercontent.com/timescale/patroni/v2.2.0-beta.0/patroni/config.py > /usr/lib/python3/dist-packages/patroni/config.py
+
 ## Fix permissions
 RUN chown postgres:postgres "${PGLOG}" "${PGROOT}" "${PGDATA}" /var/run/postgresql/ -R
 RUN chown postgres:postgres /var/log/pgbackrest/ /var/lib/pgbackrest /var/spool/pgbackrest -R