updates for adding pg master standby config to dev portal

templates/devportal-postgres.conf.j2

diff --git a/templates/devportal-postgres.conf.j2 b/templates/devportal-postgres.conf.j2
index 740a86e..9ca5979 100644
--- a/templates/devportal-postgres.conf.j2
+++ b/templates/devportal-postgres.conf.j2
@@ -2,4 +2,9 @@
 MP_POD={{ opdk_mp_pod | default(default_mp_pod) }}
 REGION={{ region }}
 PG_PWD='{{ devportal_pg_pass | default(pg_pass) }}'
-
+{% if db_pgstandby_ip is defined %}
+PG_STANDBY={{ db_pgstandby_ip }}
+{% endif %}
+{% if db_pgmaster_ip is defined %}
+PG_MASTER={{ db_pgmaster_ip }}
+{% endif %}