Update storage configuration and .gitignore

- Switch from AWS S3 to local file storage
- Add .env.example to .gitignore
- Remove AWS-related configuration in settings.py

.gitignore

@@ -120,6 +120,7 @@ celerybeat.pid
 *.sage.py
 
 # Environments
+.env.example
 .env
 .venv
 env/

apibase/settings.py

@@ -259,15 +259,10 @@ DJANGORESIZED_DEFAULT_FORMAT_EXTENSIONS = {"JPEG": ".jpg"}
 DJANGORESIZED_DEFAULT_NORMALIZE_ROTATION = True
 
 
-AWS_ACCESS_KEY_ID = config("AWS_ACCESS_KEY_ID")
-AWS_SECRET_ACCESS_KEY = config("AWS_ACCESS_SECRET")
-AWS_STORAGE_BUCKET_NAME = config("AWS_BUCKET")
-AWS_S3_FILE_OVERWRITE = False
-AWS_DEFAULT_ACL = None
-DEFAULT_FILE_STORAGE = "storages.backends.s3.S3Storage"
+DEFAULT_FILE_STORAGE = "django.core.files.storage.FileSystemStorage"
 STORAGES = {
     "default": {
-        "BACKEND": "storages.backends.s3.S3Storage",
+        "BACKEND": "django.core.files.storage.FileSystemStorage",
     },
     "staticfiles": {
         "BACKEND": "whitenoise.storage.CompressedManifestStaticFilesStorage",