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

LICENSE

@@ -19,3 +19,7 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
+---
+
+fonts/GnuMICR.otf is licensed separately under the GNU General Public
+License v2.0. See fonts/LICENSE for details.