Update PPT template with background image

global_config.py

@@ -31,7 +31,7 @@ class GlobalConfig:
     PPTX_TEMPLATE_FILES = {
         'Basic': {
             'file': 'pptx_templates/Blank.pptx',
-            'caption': 'A good start'
+            'caption': 'A good start (Uses [photos](https://unsplash.com/photos/AFZ-qBPEceA) by [cetteup](https://unsplash.com/@cetteup?utm_content=creditCopyText&utm_medium=referral&utm_source=unsplash) on [Unsplash](https://unsplash.com/photos/a-foggy-forest-filled-with-lots-of-trees-d3ci37Gcgxg?utm_content=creditCopyText&utm_medium=referral&utm_source=unsplash))'
         },
         'Ion Boardroom': {
             'file': 'pptx_templates/Ion_Boardroom.pptx',

pptx_templates/Blank.pptx

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:c936335a23f5e4441085e638032f8f82ca19d6c71adbcc089583b765dbc9d883
-size 1546152
+oid sha256:2911b846f96d2a060ca4183d56d8059e3d62d51c5ed690950dc1dfd29824a1dc
+size 61920