chore(deps): bump oven/bun from 1.3.12-alpine to 1.3.13-alpine

Bumps oven/bun from 1.3.12-alpine to 1.3.13-alpine.

---
updated-dependencies:
- dependency-name: oven/bun
  dependency-version: 1.3.13-alpine
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -1,5 +1,5 @@
 # Site builder
-FROM oven/bun:1.3.12-alpine AS frontend-builder
+FROM oven/bun:1.3.13-alpine AS frontend-builder
 
 WORKDIR /frontend
 

Dockerfile.distroless

@@ -1,5 +1,5 @@
 # Site builder
-FROM oven/bun:1.3.12-alpine AS frontend-builder
+FROM oven/bun:1.3.13-alpine AS frontend-builder
 
 WORKDIR /frontend
 

internal/bootstrap/app_bootstrap.go

@@ -47,6 +47,10 @@ func (app *BootstrapApp) Setup() error {
 	fmt.Println("Tinyauth is moving to an organization! All versions after v5.0.7 will be released under ghcr.io/tinyauthapp/tinyauth. Existing images will continue to work but new features and updates (including security ones) will only be released under the new image path.")
 
 	// get app url
+	if app.config.AppURL == "" {
+		return fmt.Errorf("app URL cannot be empty, perhaps config loading failed")
+	}
+
 	appUrl, err := url.Parse(app.config.AppURL)
 
 	if err != nil {