Merge branch 'themes' of https://git.exocortex.ru/Exocortex/hydrogen into themes

classes.py

@@ -24,7 +24,15 @@ else:
     base_dir = Path(__file__).resolve().parent    
 
 # Prepare template rendering engine
-jinja_env_dir = f"{base_dir}/themes/{Config.THEME}/templates"
+if Path(f"themes/{Config.THEME}/templates").exists():
+    # Use the templates from the initialized site instance and the installed theme 
+    jinja_env_dir = f"themes/{Config.THEME}/templates"
+    print("USING LOCALLY INITIALIZED THEMES")
+else:
+    # Use default templates from the default theme shipped with the app
+    # i.e. PyInstaller-packed single executable
+    print("USING DEFAULT THEMES")
+    jinja_env_dir = f"{base_dir}/themes/default/templates"
 env = Environment(loader=FileSystemLoader(f"{jinja_env_dir}"))
 env.globals['header_image'] = f"{base_dir}/themes/{Config.THEME}/static/images/header.jpg"
 index_template = env.get_template("index.html")