added initial docker setup for running NGAS locally

ci/psql/init_ngas_db.sh

+#!/bin/bash
+
+set -e
+set -o pipefail
+
+DB=ngas
+PATH_TO_SQL_FILE=/repos/ngas/src/ngamsCore/ngamsSql/ngamsCreateTables-PostgreSQL.sql
+
+echo "Creating database '$DB' "
+createdb -U $POSTGRES_USER -O $POSTGRES_USER $DB
+
+echo "Populating database '$DB' "
+psql -U $POSTGRES_USER -1 -d $DB -f $PATH_TO_SQL_FILE
+
+echo "'$DB' was created and populated successfully"