Fix category shadow foreign keys and .NET 10 Docker build context

.dockerignore

@@ -0,0 +1,28 @@
+# Build with the repository root as context.
+.git
+**/bin
+**/obj
+**/.vs
+**/.idea
+**/TestResults
+**/*.user
+**/*.suo
+**/*.log
+**/node_modules
+
+# Runtime configuration and credentials must be supplied outside the image.
+**/appsettings*.json
+**/secrets.json
+**/.env
+**/.env.*
+**/*.pfx
+**/*.pem
+**/*.key
+
+# Local receipts, database files, and backups are not application assets.
+**/receipts
+**/*.db
+**/*.db-*
+**/*.mdf
+**/*.ldf
+**/*.bak