Move upload folder to static defaults.

I can configure this path on the SyncThing side, so it is
fine for it to be in the application source folder for now.

Potentially easier to arrange backup as well.

xppl/config.py

@@ -12,6 +12,9 @@ class Base():
     TESTING = False
     SQLALCHEMY_TRACK_MODIFICATIONS = False
     SQLALCHEMY_DATABASE_URI = 'rqlite+pyrqlite://localhost:4001/'
+    UPLOAD_FOLDER_COVER = join(BASEDIR, 'cover')
+    UPLOAD_FOLDER = join(BASEDIR, 'uploads')
+    LIGHT = not isdir(UPLOAD_FOLDER)
 
 
 class Production(Base):
@@ -27,6 +30,3 @@ class Development(Base):
     TESTING = True
     DOMAIN = 'http://localhost'
     SECRET_KEY = urandom(24).hex()
-    UPLOAD_FOLDER_COVER = join(BASEDIR, 'cover')
-    UPLOAD_FOLDER = join(BASEDIR, 'uploads')
-    LIGHT = not isdir(UPLOAD_FOLDER)