feat: coding interview platform

.github/workflows/coding-interview_ci.yml

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+name: CI for Coding Interview Platform
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - main
+    paths:
+      - '02-coding-interview/**'
+  push:
+    branches:
+      - main
+    paths:
+      - '02-coding-interview/**'
+
+defaults:
+  run:
+    working-directory: 02-coding-interview
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '20'
+        cache: 'npm'
+        cache-dependency-path: 02-coding-interview/package-lock.json
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Run ESLint (Frontend)
+      run: npm run lint -w @interview/frontend
+
+    - name: Run TypeScript compiler check
+      run: npm run build
+
+  test:
+    runs-on: ubuntu-latest
+
+    services:
+      postgres:
+        image: postgres:15-alpine
+        env:
+          POSTGRES_DB: interview_platform
+          POSTGRES_USER: admin
+          POSTGRES_PASSWORD: password
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+      redis:
+        image: redis:7-alpine
+        ports:
+          - 6379:6379
+        options: >-
+          --health-cmd "redis-cli ping"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+      docker:
+        image: docker:dind
+        options: --privileged
+        ports:
+          - 2375:2375
+        env:
+          DOCKER_TLS_CERTDIR: ""
+
+    env:
+      DOCKER_HOST: tcp://localhost:2375
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '20'
+        cache: 'npm'
+        cache-dependency-path: 02-coding-interview/package-lock.json
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Set up environment
+      run: |
+        cd packages/backend
+        cp .env.example .env
+
+    - name: Generate Prisma Client
+      run: |
+        cd packages/backend
+        npx prisma generate
+
+    - name: Run database migrations
+      run: |
+        cd packages/backend
+        echo "Running migrations..."
+        npx prisma migrate deploy
+        echo "Migration exit code: $?"
+        echo "Verifying tables..."
+        npx prisma db execute --stdin <<< "SELECT tablename FROM pg_tables WHERE schemaname = 'public';"
+      env:
+        DATABASE_URL: postgresql://admin:password@localhost:5432/interview_platform
+
+    - name: Wait for Docker and pull images
+      run: |
+        echo "Waiting for Docker daemon..."
+        timeout 60 sh -c 'until docker info > /dev/null 2>&1; do sleep 2; done'
+        echo "Docker is ready. Pulling test images..."
+        docker pull node:20-alpine
+        docker pull python:3.11-alpine
+
+    - name: Run integration tests
+      run: npm test -- --verbose
+      env:
+        DATABASE_URL: postgresql://admin:password@localhost:5432/interview_platform
+        REDIS_URL: redis://localhost:6379
+        NODE_ENV: test
+
+    - name: Upload test results
+      if: always()
+      uses: actions/upload-artifact@v4
+      with:
+        name: test-results
+        path: 02-coding-interview/packages/backend/coverage/

02-coding-interview/.dockerignore

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+node_modules
+dist
+.git
+.gitignore
+*.md
+.env
+.env.local
+.DS_Store
+packages/*/node_modules
+packages/*/dist
+packages/backend/.env
+packages/backend/.env.local
+packages/frontend/.env
+packages/frontend/.env.local
+coverage
+*.log
+.vscode
+.idea

02-coding-interview/.gitignore

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+# Dependencies
+node_modules/
+.pnp
+.pnp.js
+
+# Testing
+coverage/
+
+# Production
+dist/
+build/
+
+# Environment variables
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# Prisma - keep migrations tracked for CI/CD
+# packages/backend/prisma/migrations/
+
+# Temporary files
+tmp/
+temp/
+*.tmp

02-coding-interview/Dockerfile

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+# Multi-stage build for coding interview platform
+FROM node:20-alpine AS builder
+
+# Set working directory
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+COPY packages/shared/package*.json ./packages/shared/
+COPY packages/backend/package*.json ./packages/backend/
+COPY packages/frontend/package*.json ./packages/frontend/
+
+# Install dependencies
+RUN npm ci
+
+# Copy source code
+COPY packages/shared ./packages/shared
+COPY packages/backend ./packages/backend
+COPY packages/frontend ./packages/frontend
+
+# Build all packages
+RUN npm run build
+
+# Production stage
+FROM node:20-alpine
+
+WORKDIR /app
+
+# Copy package files for production install
+COPY package*.json ./
+COPY packages/shared/package*.json ./packages/shared/
+COPY packages/backend/package*.json ./packages/backend/
+COPY packages/frontend/package*.json ./packages/frontend/
+
+# Install production dependencies only
+RUN npm ci --production
+
+# Copy built artifacts from builder
+COPY --from=builder /app/packages/shared/dist ./packages/shared/dist
+COPY --from=builder /app/packages/backend/dist ./packages/backend/dist
+COPY --from=builder /app/packages/frontend/dist ./packages/frontend/dist
+
+# Copy Prisma schema and migrations
+COPY packages/backend/prisma ./packages/backend/prisma
+
+# Generate Prisma Client
+RUN cd packages/backend && npx prisma generate
+
+# Expose port (Render uses PORT env var, defaults to 10000)
+EXPOSE 10000
+
+# Set environment to production
+ENV NODE_ENV=production
+ENV PORT=10000
+
+# Start the backend server (which will serve the frontend)
+CMD ["node", "packages/backend/dist/index.js"]