feat(serve): add TLS support with --tls-cert and --tls-key flags

Adds make cert target for self-signed dev certs and development guide.

.gitignore

@@ -1,6 +1,7 @@
 # Binary
 nib
 tmp/
+certs/
 
 # Database
 *.db

Makefile

@@ -2,7 +2,7 @@ BINARY  := nib
 MODULE  := github.com/lerko/nib
 GOFLAGS := -trimpath
 
-.PHONY: build dev watch test lint fmt vet clean run help
+.PHONY: build dev watch test lint fmt vet clean run cert help
 
 ## —— Build ——————————————————————————————————
 
@@ -41,6 +41,14 @@ fmt-check: ## Check formatting (fails if unformatted)
 
 ## —— Utility ————————————————————————————————
 
+cert: ## Generate self-signed dev TLS cert (certs/)
+	@mkdir -p certs
+	openssl req -x509 -newkey ec -pkeyopt ec_paramgen_curve:prime256v1 \
+		-nodes -keyout certs/dev.key -out certs/dev.crt -days 365 \
+		-subj "/CN=localhost"
+	@echo "  certs/dev.crt and certs/dev.key ready"
+	@echo "  usage: make run ARGS=\"serve --tls-cert certs/dev.crt --tls-key certs/dev.key\""
+
 clean: ## Remove build artifacts
 	rm -f $(BINARY) coverage.out
 

cmd/serve.go

@@ -20,6 +20,8 @@ var WebFS fs.FS
 var (
 	servePort int
 	serveDev  bool
+	tlsCert   string
+	tlsKey    string
 )
 
 var serveCmd = &cobra.Command{
@@ -29,12 +31,19 @@ var serveCmd = &cobra.Command{
 }
 
 func init() {
-	serveCmd.Flags().IntVar(&servePort, "port", 0, "port to listen on (default 4444)")
+	serveCmd.Flags().IntVar(&servePort, "port", 0, "port to listen on (default 4444, or 4443 with TLS)")
 	serveCmd.Flags().BoolVar(&serveDev, "dev", false, "enable CORS for development")
+	serveCmd.Flags().StringVar(&tlsCert, "tls-cert", "", "path to TLS certificate file")
+	serveCmd.Flags().StringVar(&tlsKey, "tls-key", "", "path to TLS private key file")
 	rootCmd.AddCommand(serveCmd)
 }
 
 func runServe(_ *cobra.Command, _ []string) error {
+	useTLS := tlsCert != "" && tlsKey != ""
+	if (tlsCert != "") != (tlsKey != "") {
+		return fmt.Errorf("both --tls-cert and --tls-key are required for TLS")
+	}
+
 	port := servePort
 	if port == 0 {
 		if envPort := os.Getenv("NIB_PORT"); envPort != "" {
@@ -43,6 +52,8 @@ func runServe(_ *cobra.Command, _ []string) error {
 				return fmt.Errorf("invalid NIB_PORT: %w", err)
 			}
 			port = p
+		} else if useTLS {
+			port = 4443
 		} else {
 			port = 4444
 		}
@@ -69,12 +80,23 @@ func runServe(_ *cobra.Command, _ []string) error {
 	defer stop()
 
 	go func() {
-		fmt.Printf("nib serving on %s\n", addr)
+		if useTLS {
+			fmt.Printf("nib serving on https://localhost%s\n", addr)
+		} else {
+			fmt.Printf("nib serving on http://localhost%s\n", addr)
+		}
 		if serveDev {
 			fmt.Println("  CORS enabled (dev mode)")
 		}
-		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
-			fmt.Fprintf(os.Stderr, "server error: %v\n", err)
+
+		var listenErr error
+		if useTLS {
+			listenErr = srv.ListenAndServeTLS(tlsCert, tlsKey)
+		} else {
+			listenErr = srv.ListenAndServe()
+		}
+		if listenErr != nil && listenErr != http.ErrServerClosed {
+			fmt.Fprintf(os.Stderr, "server error: %v\n", listenErr)
 		}
 	}()
 

docs/development.md

@@ -0,0 +1,87 @@
+# Development Guide
+
+## Prerequisites
+
+- Go 1.24+
+- [air](https://github.com/air-verse/air) (live-reload, install: `go install github.com/air-verse/air@latest`)
+- OpenSSL (for dev TLS certs)
+
+## Quick Start
+
+```sh
+make cert       # one-time: generate self-signed TLS cert
+make watch      # start dev server with live-reload (HTTP, port 4444)
+```
+
+## Make Targets
+
+### Build
+
+| Target | Description |
+|--------|-------------|
+| `make build` | Compile production binary (`./nib`) |
+| `make dev` | Run dev server from source (HTTP, port 4444) |
+| `make watch` | Live-reload dev server via air — auto-rebuilds on save |
+
+### Quality
+
+| Target | Description |
+|--------|-------------|
+| `make test` | Run all tests |
+| `make test-v` | Run all tests with verbose output |
+| `make test-cover` | Run tests with per-function coverage report |
+| `make lint` | Run vet + format check |
+| `make vet` | Static analysis via `go vet` |
+| `make fmt` | Auto-format all Go files |
+| `make fmt-check` | Check formatting without modifying (CI-friendly) |
+
+### Utility
+
+| Target | Description |
+|--------|-------------|
+| `make cert` | Generate self-signed dev TLS cert in `certs/` (valid 365 days) |
+| `make clean` | Remove build artifacts |
+| `make tidy` | Tidy and verify Go module dependencies |
+| `make run ARGS="..."` | Build then run with custom args |
+| `make help` | List all targets |
+
+## TLS
+
+nib supports TLS via `--tls-cert` and `--tls-key` flags on the `serve` command.
+
+### Dev (self-signed)
+
+```sh
+make cert
+make run ARGS="serve --tls-cert certs/dev.crt --tls-key certs/dev.key"
+```
+
+Serves HTTPS on port 4443. Browser will warn about the self-signed cert — accept once.
+
+This is needed for features that require a secure context (e.g. clipboard API).
+
+### Production
+
+For production, use a reverse proxy (Caddy, nginx) with real certificates in front of nib's HTTP server. Alternatively, pass real cert/key paths directly:
+
+```sh
+./nib serve --tls-cert /path/to/cert.pem --tls-key /path/to/key.pem
+```
+
+### Port Defaults
+
+| Mode | Default Port |
+|------|-------------|
+| HTTP | 4444 |
+| HTTPS | 4443 |
+
+Override with `--port` or the `NIB_PORT` environment variable.
+
+## Typical Workflow
+
+1. `make cert` — once, generates dev TLS cert
+2. `make watch` — start coding, air rebuilds on save
+3. Edit code, save, changes appear automatically
+4. `make test` — verify nothing broke
+5. `make lint` — check formatting and vet
+6. Commit and push