Added new conf settings for postgres tls

Author: bhaskarkishore

proxy.conf

@@ -95,6 +95,12 @@
         "pool_idle_connections": 16,
         # Connection timeout in seconds
         "pool_connection_timeout": 30
+
+        # Optional SSL mode. If not set, will default to `prefer`. See postgres doc for other values
+        #"ssl_mode": "require",
+
+        # Optional CA certificate path for use with the above `ssl_mode` parameter
+        #"cert_path": "/opt/imageproxy/ca.crt"
     }
 
     # Cache configuration