feature: basic auth0 support (#78)

* feature: basic auth0 support

* refactor: improve auth flow

* refactor: extract HttpServer config

* feature: merge HTTP API layer with Let's Encrypt

management/http_server/middleware/authenticated.go

@@ -0,0 +1,31 @@
+package middleware
+
+import (
+	"github.com/gorilla/sessions"
+	"net/http"
+)
+
+type AuthMiddleware struct {
+	sessionStore sessions.Store
+}
+
+func NewAuth(sessionStore sessions.Store) *AuthMiddleware {
+	return &AuthMiddleware{sessionStore: sessionStore}
+}
+
+func (am *AuthMiddleware) IsAuthenticated(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+
+	session, err := am.sessionStore.Get(r, "auth-session")
+	if err != nil {
+		//todo redirect to the error page stating: "error occurred plz try again later and a link to login"
+		//http.Error(w, err.Error(), http.StatusInternalServerError)
+		http.Redirect(w, r, "/login", http.StatusSeeOther)
+		return
+	}
+
+	if _, ok := session.Values["profile"]; !ok {
+		http.Redirect(w, r, "/login", http.StatusSeeOther)
+	} else {
+		next(w, r)
+	}
+}