Add config file and rework cli parsing and passing of config values (#263)

Co-authored-by: 6543 <6543@obermui.de>
Reviewed-on: https://codeberg.org/Codeberg/pages-server/pulls/263
Reviewed-by: 6543 <6543@obermui.de>
Co-authored-by: crapStone <me@crapstone.dev>
Co-committed-by: crapStone <me@crapstone.dev>

cli/setup.go

@@ -0,0 +1,39 @@
+package cli
+
+import (
+	"fmt"
+
+	"github.com/rs/zerolog/log"
+	"github.com/urfave/cli/v2"
+
+	"codeberg.org/codeberg/pages/server/database"
+	"codeberg.org/codeberg/pages/server/version"
+)
+
+func CreatePagesApp() *cli.App {
+	app := cli.NewApp()
+	app.Name = "pages-server"
+	app.Version = version.Version
+	app.Usage = "pages server"
+	app.Flags = ServerFlags
+	app.Commands = []*cli.Command{
+		Certs,
+	}
+
+	return app
+}
+
+func OpenCertDB(ctx *cli.Context) (certDB database.CertDB, closeFn func(), err error) {
+	certDB, err = database.NewXormDB(ctx.String("db-type"), ctx.String("db-conn"))
+	if err != nil {
+		return nil, nil, fmt.Errorf("could not connect to database: %w", err)
+	}
+
+	closeFn = func() {
+		if err := certDB.Close(); err != nil {
+			log.Error().Err(err)
+		}
+	}
+
+	return certDB, closeFn, nil
+}