Mr. Drew's Assignment Creator — Docker share build

Self-contained Dockerized build for end users. Run via docker compose;
see README.md for setup. Source-only, no sample data or build artifacts.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,7 @@
+node_modules/
+.next/
+data/db.json
+.DS_Store
+*.pdf
+*.png
+*.log