feat: Runtime configuration and Docker deployment improvements

Frontend:
- Add runtime configuration service for deployment-time API URL injection
- Create docker-entrypoint.sh to generate config.json from environment variables
- Update ApiService, ApprovalService, and DocumentViewer to use RuntimeConfigService
- Add APP_INITIALIZER to load runtime config before app starts

Backend:
- Fix init-blockchain.js to properly quote mnemonic phrases in .env file
- Improve docker-entrypoint.sh with health checks and better error handling

Docker:
- Add API_BASE_URL environment variable to frontend container
- Update docker-compose.yml with clear documentation for remote deployment
- Reorganize .env.example with clear categories (REQUIRED FOR REMOTE, PRODUCTION, AUTO-GENERATED)

Workflow fixes:
- Fix DepartmentApproval interface to match backend schema
- Fix stage transformation for 0-indexed stageOrder
- Fix workflow list to show correct stage count from definition.stages

Cleanup:
- Move development artifacts to .trash directory
- Remove root-level package.json (was only for utility scripts)
- Add .trash/ to .gitignore

backend/Dockerfile

@@ -50,14 +50,21 @@ COPY --from=builder --chown=nestjs:nodejs /app/dist ./dist
 COPY --from=builder --chown=nestjs:nodejs /app/node_modules ./node_modules
 COPY --from=builder --chown=nestjs:nodejs /app/package*.json ./
 
-# Copy compiled database migrations and seeds from dist
+# Copy compiled database migrations and seeds from dist (only .js files, no .d.ts or .map)
 COPY --from=builder --chown=nestjs:nodejs /app/dist/database/migrations ./src/database/migrations
 COPY --from=builder --chown=nestjs:nodejs /app/dist/database/seeds ./src/database/seeds
 COPY --from=builder --chown=nestjs:nodejs /app/dist/database/knexfile.js ./src/database/knexfile.js
 
-# Copy initialization scripts
+# Remove TypeScript declaration files that can confuse Knex
+RUN find ./src/database -name "*.d.ts" -delete && \
+    find ./src/database -name "*.js.map" -delete
+
+# Copy initialization scripts (shell and JS)
 COPY --chown=nestjs:nodejs scripts ./scripts
-RUN chmod +x scripts/*.sh
+RUN chmod +x scripts/*.sh 2>/dev/null || true
+
+# Create data directory for initialization flags
+RUN mkdir -p /app/data && chown nestjs:nodejs /app/data
 
 # Set environment variables
 ENV NODE_ENV=production