Update contributing document to increase max connections
in postgres unit tests
@@ -156,6 +156,7 @@ As of Diego 1.0, SQL unit tests are the default unit tests for Diego. To run the
-v $PWD/server.key:/var/lib/postgresql/server.key \
postgres \
-c ssl=on \
+ -c max_connections=300 \
-c ssl_cert_file=/var/lib/postgresql/server.crt \
-c ssl_key_file=/var/lib/postgresql/server.key
