Add full project structure: backend, frontend, Docker, and CI workflows

- Organize backend into src/ (routes/, services/, db/) per package.json entrypoint
- Add migrations/import-mdb.js for one-time .mdb → SQLite migration
- Add public/ frontend: check ledger table, slide-in new/edit panel, PDF generation
- Add docker/Dockerfile and docker-compose.yml for self-hosted deployment
- Add .github/workflows: Docker Hub build+push on main/tags, TODO→Issues scanner
- Add GnuMICR font files (GPL-2.0) for MICR E-13B line rendering

TODO.md

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+# TODO
+
+## MVP
+
+- [ ] Build `public/index.html` -- app shell, header with company name and current check number
+- [ ] Build `public/css/style.css` -- functional, dense layout; ledger table is primary view
+- [ ] Build `public/js/app.js` -- all frontend logic via `fetch()`
+- [ ] Check ledger table -- columns: check #, date, payee, amount, memo, printed status
+- [ ] Ledger: filter by printed / unprinted
+- [ ] Ledger: sort by check number and date
+- [ ] New check form -- fields: payee, amount, date, memo, note1, note2; address fields collapsed by default
+- [ ] New check form -- slide-in panel or modal, not a separate page
+- [ ] Edit mode for unprinted checks (inline or same panel as new check form)
+- [ ] Checkbox selection of 1--3 checks for print; enforce the 3-check maximum in the UI
+- [ ] "Generate PDF" button -- POST to `/api/pdf`, open resulting PDF in a new browser tab
+- [ ] Reprint flow -- allow re-generating PDF for already-printed checks without re-marking (`?mark_printed=false`)
+- [ ] Delete confirmation for unprinted checks
+- [ ] Basic error display for API failures (failed PDF generation, validation errors)
+- [ ] Amount input validation -- numeric, two decimal places, greater than zero
+- [ ] Date input defaults to today
+- [ ] Check number display -- show next check number on new check form (read from account)
+- [ ] Run migration against `Montana Dinosaur Center.mdb` and verify all check records import correctly
+- [ ] Verify PDF output: spot-check field positions against a printed check from the original software
+- [ ] Verify MICR line renders using GnuMICR.otf and lands at correct Y position
+- [ ] Docker Compose smoke test -- confirm app starts, DB initializes, and PDF endpoint responds
+
+---
+
+## Post-MVP / Future Features
+
+These exist in the original ezCheckPrinting software but are intentionally out of scope for MVP.
+
+### Multi-account support
+- [ ] Account switcher -- the original software has ~14 accounts across TMDC, Lions, District 37, etc.
+- [ ] `account_id` foreign key on `checks` and `layout_fields` tables
+- [ ] Account management UI -- create, edit, delete accounts
+- [ ] Per-account logo and signature image upload
+- [ ] Per-account bank configuration (routing, account number, transit code, company info)
+
+### Check layout editor
+- [ ] Visual layout editor -- drag or nudge field positions (X/Y in inches)
+- [ ] Per-field font, size, and visibility toggles
+- [ ] Printer offset calibration UI (offset left/right/up/down) for aligning to check stock
+- [ ] Preview panel that reflects layout changes before saving
+
+### Payee management
+- [ ] Payee address book -- store and recall payee name + address lines
+- [ ] Autocomplete payee field from address book on new check form
+
+### Check stub
+- [ ] 1-up with stub layout (alternative to 3-up) -- stub fields are already in `layout_fields`
+- [ ] Stub field rendering in PDF service (fields prefixed `Stub` in `layout_fields`)
+
+### Reporting and ledger features
+- [ ] Date range filter on ledger
+- [ ] Search/filter by payee name
+- [ ] Total amount display for filtered ledger view
+- [ ] CSV export of check ledger
+
+### Import / migration
+- [ ] Multi-account `.mdb` import -- run migration script per account, associate with account record
+- [ ] Import logo from `.mdb` `Settings` table for accounts that have one (already implemented in script, needs UI trigger)
+
+### Authentication
+- [ ] Basic auth or simple password gate for any deployment that leaves the local network