Update security middleware and update Docker configurations

- Added a new parameter to the SecurityMiddleware function to allow custom handling of forbidden requests.
- Updated Docker configurations to enable asset caching for improved performance.
- Bumped version number in the Dockerfile to 0.3.0 and refined the image description for clarity.
- Adjusted various frontend components and error handling to support new rate limiting and forbidden access messages.
- Improved documentation in multiple languages to reflect recent changes in features and security measures.

internal/security/security.go

@@ -193,7 +193,7 @@ func GetSafeHTTPClient(timeout time.Duration) *http.Client {
 	}
 }
 
-func SecurityMiddleware(s *stats.Service, bb *BotBlocker) func(http.Handler) http.Handler {
+func SecurityMiddleware(s *stats.Service, bb *BotBlocker, forbiddenHandler http.HandlerFunc) func(http.Handler) http.Handler {
 	return func(next http.Handler) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 			start := time.Now()
@@ -240,7 +240,11 @@ func SecurityMiddleware(s *stats.Service, bb *BotBlocker) func(http.Handler) htt
 				s.GlobalStats.Lock()
 				s.GlobalStats.BlockedRequests[fingerprint] = true
 				s.GlobalStats.Unlock()
-				http.Error(w, "Bots are not allowed", http.StatusForbidden)
+				if forbiddenHandler != nil {
+					forbiddenHandler(w, r)
+				} else {
+					http.Error(w, "Bots are not allowed", http.StatusForbidden)
+				}
 				return
 			}
 
@@ -250,7 +254,11 @@ func SecurityMiddleware(s *stats.Service, bb *BotBlocker) func(http.Handler) htt
 					s.GlobalStats.BlockedRequests[fingerprint] = true
 					s.GlobalStats.Unlock()
 					log.Printf("Blocked suspicious request: %s from %s (%s)", r.URL.String(), r.RemoteAddr, r.UserAgent())
-					http.Error(w, "Forbidden", http.StatusForbidden)
+					if forbiddenHandler != nil {
+						forbiddenHandler(w, r)
+					} else {
+						http.Error(w, "Forbidden", http.StatusForbidden)
+					}
 					return
 				}
 			}

internal/security/security_test.go

@@ -100,7 +100,7 @@ func TestGetRequestFingerprint(t *testing.T) {
 func TestSecurityMiddleware(t *testing.T) {
 	statsService := stats.NewService("test-hashes.json")
 	botBlocker := NewBotBlocker("")
-	handler := SecurityMiddleware(statsService, botBlocker)(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+	handler := SecurityMiddleware(statsService, botBlocker, nil)(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusOK)
 	}))