made url prefix an env variable

dash_app/app.py

 import dash
+import os
 from dash_app.layout import external_stylesheets
 
 
-app = dash.Dash(name=__name__, external_stylesheets=external_stylesheets, url_base_pathname='/msx/',
+URL_PREFIX = '/msx/'
+if os.getenv('MSX_URL_PREFIX', False):
+    URL_PREFIX = os.environ['MSX_URL_PREFIX']
+
+app = dash.Dash(name=__name__, external_stylesheets=external_stylesheets, url_base_pathname=URL_PREFIX,
                 suppress_callback_exceptions=True)

dash_app/graph.py

@@ -112,10 +112,11 @@ class Graph:
         associated_words_filtered = [word for word in all_associated_words if word not in current_words]
         associated_words_count = {word: associated_words_filtered.count(word) for word in list(set(associated_words_filtered))}
 
-        common_associated_words = [word for word, count in associated_words_count.items() if count >= self.COUNT_THRESHOLD]
+        count_threshold = self.COUNT_THRESHOLD
+        common_associated_words = [word for word, count in associated_words_count.items() if count >= count_threshold]
         while len(common_associated_words) > self.MAX_NUM_WORDS:
-            self.COUNT_THRESHOLD += 1
-            common_associated_words = [word for word, count in associated_words_count.items() if count >= self.COUNT_THRESHOLD]
+            count_threshold += 1
+            common_associated_words = [word for word, count in associated_words_count.items() if count >= count_threshold]
 
         self.add_nodes(common_associated_words)
         self.add_edges(base_node, common_associated_words)