Embded frontend inside go binary

This will simplify the self hosting of the platform.

Signed-off-by: gearnode <bryan@frimin.fr>

pkg/server/web/web.go

@@ -0,0 +1,83 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package web
+
+import (
+	"io/fs"
+	"log"
+	"net/http"
+
+	"github.com/getprobo/probo/apps/console"
+)
+
+type Server struct {
+	spaFS http.FileSystem
+}
+
+func NewServer() (*Server, error) {
+	subFS, err := fs.Sub(console.StaticFiles, "dist")
+	if err != nil {
+		return nil, err
+	}
+
+	log.Printf("Using embedded SPA")
+	return &Server{
+		spaFS: http.FS(subFS),
+	}, nil
+}
+
+func (s *Server) ServeSPA(w http.ResponseWriter, r *http.Request) {
+	path := r.URL.Path
+
+	if path == "/" {
+		path = "/index.html"
+	}
+
+	f, err := s.spaFS.Open(path)
+	if err == nil {
+		defer f.Close()
+
+		http.FileServer(s.spaFS).ServeHTTP(w, r)
+		return
+	}
+
+	indexFile, err := s.spaFS.Open("/index.html")
+	if err != nil {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+	defer indexFile.Close()
+
+	stat, err := indexFile.Stat()
+	if err != nil {
+		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+		return
+	}
+
+	content := make([]byte, stat.Size())
+	_, err = indexFile.Read(content)
+	if err != nil {
+		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	w.WriteHeader(http.StatusOK)
+	w.Write(content)
+}
+
+func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	s.ServeSPA(w, r)
+}