Adds Dockerfile for the 3ds build container.

docker/.dockerignore

@@ -0,0 +1,62 @@
+# Docker build context exclusions
+# Keep build context minimal for faster builds
+
+# Git
+.git/
+.gitignore
+.gitattributes
+
+# Build artifacts
+*.o
+*.elf
+*.3dsx
+*.cia
+*.smdh
+*.nro
+*.nso
+*.rpx
+*.rpl
+*.dol
+*.wad
+*.vpk
+*.self
+build/
+dist/
+*.log
+
+# IDE and editor files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Documentation and plans (not needed in container)
+docs/
+.plans/
+*.md
+!docker/*.md
+
+# Config files (copied separately if needed)
+*.json
+*.toml
+*.yaml
+*.yml
+!package.json
+
+# Node modules and dependencies
+node_modules/
+venv/
+__pycache__/
+*.pyc
+
+# Cache directories
+.cache/
+.ccache/
+*.cache
+
+# Temporary files
+tmp/
+temp/
+*.tmp