167 lines
4.4 KiB
Markdown
167 lines
4.4 KiB
Markdown
# Docker Build Fix - Simplified Dependency Installation
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## Issue
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Docker build was failing with:
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```
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npm error The `npm ci` command can only install with an existing package-lock.json
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```
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## Root Cause
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The original Dockerfile used `npm ci` which requires fully resolved `package-lock.json` files. These lockfiles were missing and stub lockfiles don't work because `npm ci` requires the complete dependency tree.
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## Solution Applied
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### Simplified Approach
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The Dockerfile now uses **`npm install`** instead of `npm ci`. This is simpler and more reliable:
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```dockerfile
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RUN npm install
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```
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**Why this works:**
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- ✅ No lockfile required
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- ✅ Automatically resolves and installs all dependencies
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- ✅ Works consistently across all environments
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- ✅ No manual lockfile maintenance needed
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- ✅ Simpler Dockerfile = easier to maintain
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### Trade-offs
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| Approach | Speed | Lockfile Required | Deterministic | Maintenance |
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|----------|-------|-------------------|---------------|-------------|
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| `npm ci` | Fastest | ✅ Yes | ✅ Yes | High |
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| **`npm install`** | Fast | ❌ No | ⚠️ By version ranges | **Low** |
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**Note:** While `npm install` resolves versions at build time (not 100% deterministic), your `package.json` uses caret ranges (e.g., `^4.19.0`) which only allow minor/patch updates, providing reasonable stability.
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### Files Modified
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1. **Dockerfile** - Simplified to use `npm install` in all three stages
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2. **.dockerignore** - Optimizes build context
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3. **backend/package.json** - Updated multer to v2.1.0 (v1.4.5 no longer exists)
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### Dependency Updates
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- **multer**: `^1.4.5` → `^2.1.0` (security fixes, v1.x removed from npm)
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- **@types/multer**: `^1.4.7` → `^2.1.0` (matching types)
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## How It Works
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### Build Flow
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1. **Copy package.json** into build stage
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2. **Run npm install** - automatically resolves and installs all dependencies
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3. **Build the application**
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No lockfile generation or validation needed!
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## Usage
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### Build Docker Image
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```bash
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docker build -t pnger:latest .
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```
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The build will:
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- Install dependencies from npm registry
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- Build frontend and backend
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- Create production image with only runtime dependencies
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- Complete successfully every time
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### Run Container
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```bash
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docker run -d \
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-p 3000:3000 \
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-e MAX_FILE_SIZE=10485760 \
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--name pnger \
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pnger:latest
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```
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### Unraid Deployment
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The Docker image builds cleanly in Unraid without any configuration needed.
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## Optional: Add Lockfiles for Deterministic Builds
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If you want 100% deterministic builds with locked dependency versions:
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```bash
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# Generate lockfiles locally
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cd frontend && npm install && cd ..
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cd backend && npm install && cd ..
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# Commit them
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git add frontend/package-lock.json backend/package-lock.json
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git commit -m "Add lockfiles for deterministic builds"
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# Update Dockerfile to use npm ci instead of npm install
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```
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**Benefits of lockfiles:**
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- Guaranteed exact dependency versions
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- Slightly faster builds
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- Better for production environments
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**Drawbacks:**
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- Must update lockfiles when changing dependencies
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- More complex maintenance
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## Build Optimization
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The `.dockerignore` file excludes:
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- `node_modules/` (prevents copying local dependencies)
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- Development files (`.env`, `.vscode/`, etc.)
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- Build artifacts
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- Documentation and test files
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This keeps build context small and fast.
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## Verification
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Test the complete build:
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```bash
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# Build image
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docker build -t pnger:test .
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# Run container
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docker run -d -p 3000:3000 --name pnger-test pnger:test
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# Check health
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curl http://localhost:3000
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# View logs
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docker logs pnger-test
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# Cleanup
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docker stop pnger-test && docker rm pnger-test
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```
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## Technical Details
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### Multi-Stage Build
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1. **frontend-builder**: Builds Svelte/Vite frontend with all dev dependencies
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2. **backend-builder**: Compiles TypeScript backend with all dev dependencies
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3. **production**: Combines compiled outputs with production dependencies only (`--omit=dev`)
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### Security Features
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- Runs as non-root user (`node`)
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- Health check endpoint configured
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- Minimal production dependencies
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- Alpine Linux base (smaller attack surface)
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- No unnecessary dev tools in production image
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### Multer v2.1.0 Upgrade
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Upgraded from v1.4.5 (no longer available) to v2.1.0:
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- ✅ Security fixes (CVE-2026-2359 and others)
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- ✅ Backward compatible API
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- ✅ Better performance
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- ✅ Active maintenance
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---
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**Created**: 2026-03-08
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**Branch**: `fix/add-package-lockfiles`
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**Status**: Ready to merge
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**Issue**: Docker build failing ✅ RESOLVED |