Patch to Streamlit Server.py to allow for an extra endpoint to download a static file

Server.py.patch

diff --git a/lib/streamlit/server/Server.py b/lib/streamlit/server/Server.py
index c292a48e..199128a9 100644
--- a/lib/streamlit/server/Server.py
+++ b/lib/streamlit/server/Server.py
@@ -153,6 +153,16 @@ def start_listening(app):
         )


+class MyFileHandler(tornado.web.StaticFileHandler):
+    def initialize(self, path):
+        self.dirname, self.filename = os.path.split(path)
+        super(MyFileHandler, self).initialize(self.dirname)
+
+    def get(self, path=None, include_body=True):
+        # Ignore 'path'.
+        super(MyFileHandler, self).get(self.filename, include_body)
+
+
 class Server(object):

     _singleton = None
@@ -260,6 +270,7 @@ class Server(object):

             routes.extend(
                 [
+                    (r"^/text/?$", MyFileHandler, {"path": os.path.join(os.getcwd(), "custom_static", "text")}),
                     (
                         make_url_path_regex(base, "(.*)"),
                         StaticFileHandler,