devcontainer and various tweaks

.dockerignore

@@ -0,0 +1,46 @@
+# Version control
+.git/
+.gitignore
+.gitattributes
+
+# Documentation and config (not needed in image)
+README.md
+*.md
+.editorconfig
+
+# Dev and tooling
+.devcontainer/
+.vscode/
+.idea/
+*.code-workspace
+html/serve.json
+
+# Package manager
+package.json
+package-lock.json
+pnpm-lock.yaml
+pnpm-workspace.yaml
+.npmrc
+node_modules/
+
+# CI/CD (not needed in image)
+.woodpecker/
+.github/
+.gitlab-ci.yml
+
+# Docker (avoid recursive context)
+Dockerfile*
+docker-compose*.yml
+.dockerignore
+
+# Environment and local
+.env
+.env.*
+*.local
+
+# OS and misc
+.DS_Store
+Thumbs.db
+*.log
+tmp/
+temp/