frontend implementation

.dockerignore

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+# Git files
+.git
+.gitignore
+.jj
+
+# Node modules (will be installed in container)
+node_modules
+backend/node_modules
+
+# Database files (use volume mount for persistence)
+data/
+*.db
+*.db-journal
+
+# Documentation and planning
+README.md
+PLAN.md
+CLAUDE.md
+
+# Development files
+.vscode
+.idea
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Temporary files
+*.tmp
+*.temp
+*.swp
+*.swo
+*~