Update requirement files with new feature templates and fix backend API error message, along with mobile project config updates and documentation improvements

03_source/mobile/dockerfile

@@ -1,15 +0,0 @@
-# Use official Node 18 base image
-FROM node:20-slim
-
-# Install pnpm globally
-# RUN npm install -g pnpm
-
-# Set working directory
-WORKDIR /app
-
-# Copy your application code (optional, comment out if not needed)
-# COPY . /app
-# RUN yarn
-
-# Default command (optional)
-CMD ["npm run start"]