server-tx part : web UI, PDF generator & transfer to RX server

server-tx/app/templates/error.html

@@ -0,0 +1,9 @@
+{% extends "general.html" %}
+
+{% block title %}Произошла ошибка{% endblock %}
+
+{% block content %}
+<div class="card">
+    <h2 style="color: darkred;">{{ error }}</h2>
+</div>
+{% endblock %}