dropped fiber for std http + gorilla websocket

Session serialization will use gob encoding instead of json.
Binary size will likely be reduced.
General backend code refactoring.

go.mod

@@ -3,29 +3,12 @@ module github.com/marcopeocchi/yt-dlp-web-ui
 go 1.20
 
 require (
+	github.com/go-chi/chi/v5 v5.0.10
 	github.com/goccy/go-json v0.10.2
-	github.com/gofiber/fiber/v2 v2.47.0
-	github.com/gofiber/websocket/v2 v2.2.1
 	github.com/golang-jwt/jwt/v5 v5.0.0
 	github.com/google/uuid v1.3.0
+	github.com/gorilla/websocket v1.5.0
 	github.com/marcopeocchi/fazzoletti v0.0.0-20230308161120-c545580f79fa
 	golang.org/x/sys v0.9.0
 	gopkg.in/yaml.v3 v3.0.1
 )
-
-require (
-	github.com/andybalholm/brotli v1.0.5 // indirect
-	github.com/fasthttp/websocket v1.5.3 // indirect
-	github.com/klauspost/compress v1.16.6 // indirect
-	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-isatty v0.0.19 // indirect
-	github.com/mattn/go-runewidth v0.0.14 // indirect
-	github.com/philhofer/fwd v1.1.2 // indirect
-	github.com/rivo/uniseg v0.4.4 // indirect
-	github.com/savsgio/dictpool v0.0.0-20221023140959-7bf2e61cea94 // indirect
-	github.com/savsgio/gotils v0.0.0-20230208104028-c358bd845dee // indirect
-	github.com/tinylib/msgp v1.1.8 // indirect
-	github.com/valyala/bytebufferpool v1.0.0 // indirect
-	github.com/valyala/fasthttp v1.48.0 // indirect
-	github.com/valyala/tcplisten v1.0.0 // indirect
-)