feat: Let's Encrypt SSL on site creation

internal/handler/acme.go

@@ -0,0 +1,32 @@
+package handler
+
+import (
+	"net/http"
+
+	"github.com/panelhosting/panel/internal/ssl"
+)
+
+type ACMEHandler struct {
+	store *ssl.ChallengeStore
+}
+
+func NewACMEHandler(store *ssl.ChallengeStore) *ACMEHandler {
+	return &ACMEHandler{store: store}
+}
+
+func (h *ACMEHandler) Challenge(w http.ResponseWriter, r *http.Request) {
+	token := r.PathValue("token")
+	if token == "" {
+		http.NotFound(w, r)
+		return
+	}
+
+	keyAuth, ok := h.store.Get(token)
+	if !ok {
+		http.NotFound(w, r)
+		return
+	}
+
+	w.Header().Set("Content-Type", "text/plain")
+	_, _ = w.Write([]byte(keyAuth))
+}