chore: update gitignore and dev cont

.devcontainer/devcontainer.json

@@ -3,7 +3,7 @@
 {
   "name": "caddy-manager-devcon",
   // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-  "image": "mcr.microsoft.com/devcontainers/dotnet:1-9.0",
+  "image": "mcr.microsoft.com/devcontainers/dotnet:9.0",
   // Features to add to the dev container. More info: https://containers.dev/features.
   // "features": {},
 

.gitignore

@@ -5,3 +5,4 @@ riderModule.iml
 /_ReSharper.Caches/
 .idea/
 *.sln.DotSettings.user
+.vscode/