Allow to reset key store and stop key fetching

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

akms-simulator/akms-simulator.go

@@ -38,7 +38,7 @@ func main() {
 	router := http.NewServeMux()
 
 	router.HandleFunc("/api/v1/keys/push_ksa_key", handlePushKsaKey)
-	router.HandleFunc("/debug/get_log_file", getLogFile)
+	router.HandleFunc("/debug/get_log_file", logFileRequest)
 
 	server := &http.Server{
 		Addr:    ":4444",
@@ -77,7 +77,25 @@ func main() {
 	}
 }
 
-func getLogFile(w http.ResponseWriter, r *http.Request) {
+func logFileRequest(w http.ResponseWriter, r *http.Request) {
+	if r.Method == http.MethodDelete {
+		if _, err := os.Stat("akms-simulator.log"); err == nil {
+			err := os.Remove("akms-simulator.log")
+			if err != nil {
+				logrus.Errorf("Error deleting log file: %s", err)
+				w.WriteHeader(http.StatusInternalServerError)
+				return
+			}
+		}
+		logrus.Info("Log file deleted or never existed in the first place")
+		w.WriteHeader(http.StatusNoContent)
+		return
+	} else if r.Method != http.MethodGet {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		logrus.Errorf("Method not allowed: %s", r.Method)
+		return
+	}
+
 	logrus.Info("Log file requested")
 	http.ServeFile(w, r, "akms-simulator.log")
 }