large refactor of code to use venv (in .python) for DEV, to use consistent python versions with PROD, sepcifically flask 2.2.2 to address the deprecation of FLASK_ENV -> replaced with ENV. Fixed up git and dockerignores to be more stringent

TODO

@@ -1,6 +1,4 @@
 ## GENERAL
-    * get rid of deprecation with FLASK_ENV
-
     * after move, instead of back to home page, go to an ammended view of the thumbs to keep moving
 
     * ignore face should ignore ALL matching faces (re: Declan)
@@ -124,4 +122,5 @@
 ### FUTURE:
     * can emby use nfo for images (for AI/tags?)
         -NO sadly
-
+    
+    * work out why gitignore does not ignore say .pa_bin but has to ignore .pa_metada