fix: Add .dockerignore to prevent .nixpacks auto-generation

- Block .nixpacks folder from being used
- Force Easypanel to use root Dockerfile
- Ignore node_modules, dist, .git, IDE files

.dockerignore

@@ -1,10 +1,20 @@
-# See https://docs.docker.com/desktop/extensions-sdk/extensions/ignore/ for more details.
-node_modules
-dist
-*.log
-.git
+# Ignore auto-generated nixpacks folder
+.nixpacks/
+node_modules/
+dist/
+.git/
 .gitignore
-README.md
+*.log
+.DS_Store
+
+# Development
 .env
-.env.*
-!node_modules/.dockerignore
+.env.local
+.env.*.local
+
+# IDE
+.vscode/
+.idea/
+
+# Build
+.astro/