Initial commit: personal task planner with categories, projects, and tiered assignment

Personal-first lists/tasks/reminders/recurrence, plus an admin-editable status
pipeline, shared categories, project containers, and a three-tier permission
model for cross-user work: assign (hand off your own tasks), reallocate
(dispatcher — move anyone's tasks), admin (reserved, full manage-all).

backend/Dockerfile

@@ -0,0 +1,8 @@
+FROM node:22-alpine
+WORKDIR /app
+COPY package.json .
+RUN npm install --omit=dev
+COPY src ./src
+RUN mkdir -p /app/uploads
+EXPOSE 3001
+CMD ["node", "src/index.js"]