Add database and helm chart

Signed-off-by: Nikolai Rodionov <nrodionov@eos-uptrade.de>

main.go

@@ -115,7 +115,7 @@ func server(ctx context.Context, params Serve) error {
 	}()
 
 	log.Info("Opening a database connection")
-	db, err := sql.Open("postgres", "postgres://softplayer:qwertyu9@localhost:30432/softplayer?sslmode=disable")
+	db, err := sql.Open("postgres", params.DBConnectionString)
 	if err != nil {
 		log.Error(err, "Couldn't start a database driver")
 		return err