Configure push notifications for internal-only access

- Changed VAPID subject from public URL to mailto format
- Updated docker-compose.yml to use mailto:admin@littleshop.local
- Removed dependency on thebankofdebbie.giize.com public domain
- All push notifications now work through VPN (admin.dark.side) only
- Added update-push-internal.sh helper script for deployment
- Improved security by keeping all admin traffic internal

Push notifications will continue working normally through FCM,
but all configuration and management stays on the internal network.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

LittleShop/appsettings.json

@@ -1,32 +1,32 @@
-{
-  "ConnectionStrings": {
-    "DefaultConnection": "Data Source=littleshop.db"
-  },
-  "Jwt": {
-    "Key": "ThisIsATemporaryKeyFor-TestingPurposesOnlyGenerateSecureKey1234567890ABCDEF",
-    "Issuer": "LittleShop",
-    "Audience": "LittleShop",
-    "ExpiryInHours": 24
-  },
-  "RoyalMail": {
-    "ClientId": "",
-    "ClientSecret": "",
-    "BaseUrl": "https://api.royalmail.net/",
-    "SenderAddress1": "SilverLabs Ltd, 123 Business Street",
-    "SenderCity": "London", 
-    "SenderPostCode": "SW1A 1AA",
-    "SenderCountry": "United Kingdom"
-  },
-  "WebPush": {
-    "VapidPublicKey": "BMc6fFJZ8oIQKQzcl3kMnP9tTsjrm3oI_VxLt3lAGYUMWGInzDKn7jqclEoZzjvXy1QXGFb3dIun8mVBwh-QuS4",
-    "VapidPrivateKey": "dYuuagbz2CzCnPDFUpO_qkGLBgnN3MEFZQnjXNkc1MY",
-    "Subject": "mailto:admin@littleshop.local"
-  },
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
-  },
-  "AllowedHosts": "*"
+{
+  "ConnectionStrings": {
+    "DefaultConnection": "Data Source=littleshop.db"
+  },
+  "Jwt": {
+    "Key": "ThisIsATemporaryKeyFor-TestingPurposesOnlyGenerateSecureKey1234567890ABCDEF",
+    "Issuer": "LittleShop",
+    "Audience": "LittleShop",
+    "ExpiryInHours": 24
+  },
+  "RoyalMail": {
+    "ClientId": "",
+    "ClientSecret": "",
+    "BaseUrl": "https://api.royalmail.net/",
+    "SenderAddress1": "SilverLabs Ltd, 123 Business Street",
+    "SenderCity": "London", 
+    "SenderPostCode": "SW1A 1AA",
+    "SenderCountry": "United Kingdom"
+  },
+  "WebPush": {
+    "VapidPublicKey": "BMc6fFJZ8oIQKQzcl3kMnP9tTsjrm3oI_VxLt3lAGYUMWGInzDKn7jqclEoZzjvXy1QXGFb3dIun8mVBwh-QuS4",
+    "VapidPrivateKey": "dYuuagbz2CzCnPDFUpO_qkGLBgnN3MEFZQnjXNkc1MY",
+    "Subject": "mailto:admin@littleshop.local"
+  },
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
 }