added env variable to postgis/postgis.sh

postgis/postgis.sh

@@ -3,8 +3,9 @@
 set -e
 
 export PGUSER="$POSTGRES_USER"
+export PGDATABASE="$POSTGRES_DB"
 
 psql <<- EOSQL
 		CREATE EXTENSION IF NOT EXISTS postgis;
 		CREATE EXTENSION IF NOT EXISTS postgis_topology;
-EOSQL
\ No newline at end of file
+EOSQL