fix(init): prepare database (#3191)

* fix(init): prepare database

* fix(defaults): cockroach local defaults

internal/database/database.go

@@ -0,0 +1,18 @@
+package database
+
+import (
+	"database/sql"
+)
+
+func Connect(config Config) (*sql.DB, error) {
+	client, err := sql.Open("postgres", config.String())
+	if err != nil {
+		return nil, err
+	}
+
+	client.SetMaxOpenConns(int(config.MaxOpenConns))
+	client.SetConnMaxLifetime(config.MaxConnLifetime.Duration)
+	client.SetConnMaxIdleTime(config.MaxConnIdleTime.Duration)
+
+	return client, nil
+}