Add Tailwind CSS build support

.gitignore

@@ -3,4 +3,6 @@ tmp
 pem
 blogs
 .DS_Store
-*.db
+*.db
+node_modules
+public/css/styles.css

CLAUDE.md

@@ -0,0 +1,81 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Key Development Commands
+
+**Primary Build & Run Commands:**
+- `make run` - Run in development mode with live template parsing (`go run -tags=dev ./src/`)
+- `make test` - Run Go tests (`go test ./src`)
+- `make build` - Production build (includes Tailwind CSS compilation, outputs to `bin/mkblog`)
+- `make upload` - Deploy to remote server via SCP
+
+**CSS Development:**
+- `make tailwind-build` - Compile Tailwind CSS for production (minified)
+- `make tailwind-watch` - Watch mode for Tailwind CSS development
+
+**Database:**
+- Uses Goose for migrations with SQLite (`GOOSE_DRIVER=sqlite3`)
+- Migration files in `db/migrations/`
+
+## High-Level Architecture
+
+**Core Technology Stack:**
+- **Backend**: Go with Chi router, SQLite database (sqlx), structured logging (slog)
+- **Frontend**: HTML templates with Tailwind CSS, HTMX for interactivity
+- **Authentication**: GitHub OAuth with PKCE for security
+- **Deployment**: Caddy reverse proxy with REST API configuration
+- **Blog Engine**: Custom mkblog engine for static site generation
+
+**Application Flow:**
+1. **Authentication**: GitHub OAuth flow with PKCE verification, session management via cookies
+2. **Blog Management**: Users create blogs linked to GitHub repositories
+3. **Deployment Pipeline**: 
+   - Downloads repository tarball from GitHub using app installation tokens
+   - Builds static site using mkblog engine
+   - Blue/green deployment with atomic symlinks
+   - Dynamic Caddy configuration for custom subdomains (*.mkblog.dev)
+
+## Key Architectural Patterns
+
+**Build Tags for Environment-Specific Code:**
+- Development: Templates parsed on every request (`//go:build dev`)
+- Production: Templates pre-compiled at startup (`//go:build !dev`)
+
+**Database Design:**
+- Users table with GitHub integration (tokens, user info)
+- Blogs table (one blog per user, linked to GitHub repo)
+- Deployments table with status tracking and constraints ensuring single pending/running deployment per blog
+
+**Context-Based Request Handling:**
+- Middleware injects session and user data into request context
+- Type-safe context value helpers with generics
+- Authentication middleware validates GitHub tokens on each request
+
+**Template System:**
+- Embedded file system for templates in `src/view/`
+- Environment-specific rendering (dev vs prod)
+- FS configured as `os.DirFS("src/view/templates")` in dev mode
+- Template parsing uses `*.html` pattern relative to FS root
+
+## Configuration Requirements
+
+**Essential Environment Variables:**
+- `PORT=8080` - Application port
+- `DB_SOURCE_NAME=./db/mkblog.db` - SQLite database path
+- `GH_CLIENT_ID`, `GH_CLIENT_SECRET` - GitHub OAuth app credentials
+- `GH_PRIVATE_KEY_PATH` - GitHub App private key for repository access
+- `DPL_SRC_DIR`, `DPL_DIST_DIR` - Deployment directory paths
+- `RESERVED_BLOG_NAMES` - Comma-separated list of reserved subdomain names
+
+**External Dependencies:**
+- Caddy server running on port 2019 (REST API) and 443 (HTTP server)
+- GitHub App installation for repository access
+- Node.js/npm for Tailwind CSS compilation
+
+**Development Setup:**
+1. Copy `example.env` to `.env` and configure GitHub OAuth
+2. Install dependencies: `npm install` (for Tailwind)
+3. Run database migrations using Goose
+4. Start development server: `make run`
+5. Use `make tailwind-watch` for CSS development

Makefile

@@ -1,11 +1,17 @@
 include .env
 
 run:
-	go run ./src/
+	go run -tags=dev ./src/
 test:
 	go test ./src
-build:
+build: tailwind-build
 	env CGO_ENABLED=1 GOOS=${GOOS} GOARCH=${GOARCH} go build -o bin/mkblog ./src
 upload:
 	gtar -czf repo.tar.gz --exclude-vcs-ignores --exclude=repo.tar.gz .
-	scp -i "${SSH_KEY_PATH}" repo.tar.gz "${SSH_USER}@${SSH_HOST}:/opt/mkblog/repo.tar.gz"
+	scp -i "${SSH_KEY_PATH}" repo.tar.gz "${SSH_USER}@${SSH_HOST}:/opt/mkblog/repo.tar.gz"
+
+tailwind-build:
+	npx tailwindcss -i ./src/styles/tailwind.css -o ./public/css/styles.css --minify
+
+tailwind-watch:
+	npx tailwindcss -i ./src/styles/*.css -o ./public/css/styles.css --watch