refactor: consolidate Dockerfiles into single multi-stage build

- Create unified Dockerfile with multi-stage builds (base, server, ui targets)
- Centralize lib package.json COPYs in shared base stage (DRY)
- Add Claude CLI installation for Docker authentication support
- Remove duplicate apps/server/Dockerfile and apps/ui/Dockerfile
- Update docker-compose.yml to use target: parameter
- Add docker-compose.override.yml to .gitignore

Build commands:
  docker build --target server -t automaker-server .
  docker build --target ui -t automaker-ui .
  docker-compose build && docker-compose up -d

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/ui/Dockerfile

@@ -1,51 +0,0 @@
-# Automaker UI
-# Multi-stage build for minimal production image
-
-# Build stage
-FROM node:20-alpine AS builder
-
-# Install build dependencies
-RUN apk add --no-cache python3 make g++
-
-WORKDIR /app
-
-# Copy package files for all workspaces
-COPY package*.json ./
-COPY apps/ui/package*.json ./apps/ui/
-COPY libs/types/package*.json ./libs/types/
-COPY libs/utils/package*.json ./libs/utils/
-COPY libs/prompts/package*.json ./libs/prompts/
-COPY libs/platform/package*.json ./libs/platform/
-COPY libs/model-resolver/package*.json ./libs/model-resolver/
-COPY libs/dependency-resolver/package*.json ./libs/dependency-resolver/
-COPY libs/git-utils/package*.json ./libs/git-utils/
-COPY scripts ./scripts
-
-# Install dependencies (--ignore-scripts to skip husky and build:packages in prepare script)
-RUN npm ci --ignore-scripts
-
-# Copy all source files
-COPY libs ./libs
-COPY apps/ui ./apps/ui
-
-# Build packages in dependency order, then build UI
-# VITE_SERVER_URL tells the UI where to find the API server
-# Using localhost:3008 since both containers expose ports to the host
-# Use ARG to allow overriding at build time: --build-arg VITE_SERVER_URL=http://api.example.com
-ARG VITE_SERVER_URL=http://localhost:3008
-ENV VITE_SKIP_ELECTRON=true
-ENV VITE_SERVER_URL=${VITE_SERVER_URL}
-RUN npm run build:packages && npm run build --workspace=apps/ui
-
-# Production stage - serve with nginx
-FROM nginx:alpine
-
-# Copy built files
-COPY --from=builder /app/apps/ui/dist /usr/share/nginx/html
-
-# Copy nginx config for SPA routing
-COPY apps/ui/nginx.conf /etc/nginx/conf.d/default.conf
-
-EXPOSE 80
-
-CMD ["nginx", "-g", "daemon off;"]