Server v4 (#370)

* refactoring-1

introduced pipelines and abstracted download process.go in Downloader interface

* migrated to boltdb from sqlite + session files

* refactoring: config struct & pipelines

* added js runtime for yt-dlp

* updated dockerfile

* added external js runtime, metadata scraping refactor

* updated Dockerfile

* fixed env propagation in docker

* updated package name to v4

* updated readme and cd

server/sys/fs.go

@@ -4,8 +4,8 @@ import (
 	"os"
 	"path/filepath"
 
-	"github.com/marcopiovanello/yt-dlp-web-ui/v3/server/config"
-	"github.com/marcopiovanello/yt-dlp-web-ui/v3/server/internal"
+	"github.com/marcopiovanello/yt-dlp-web-ui/v4/server/config"
+	"github.com/marcopiovanello/yt-dlp-web-ui/v4/server/internal"
 	"golang.org/x/sys/unix"
 )
 
@@ -14,7 +14,7 @@ import (
 // FreeSpace gets the available Bytes writable to download directory
 func FreeSpace() (uint64, error) {
 	var stat unix.Statfs_t
-	unix.Statfs(config.Instance().DownloadPath, &stat)
+	unix.Statfs(config.Instance().Paths.DownloadPath, &stat)
 	return (stat.Bavail * uint64(stat.Bsize)), nil
 }
 
@@ -27,7 +27,7 @@ func DirectoryTree() (*[]string, error) {
 	}
 
 	var (
-		rootPath = config.Instance().DownloadPath
+		rootPath = config.Instance().Paths.DownloadPath
 
 		stack     = internal.NewStack[Node]()
 		flattened = make([]string, 0)