# Generate error pages using built-in or custom templates
> [!IMPORTANT]
> Here, we use an image with the `-builder` suffix. It's designed for generating error pages and includes
> pre-rendered templates.
Generating a set of error pages is straightforward. If you prefer to use your own template, start by creating one.
For example:
```html
{{ .StatusCode }}
{{ .Message }}: {{ .Description }}
```
Save it as `my-super-theme.html`. Then generate your error pages with the following command:
```shell
mkdir ./out
docker run --rm \
-v "$(pwd)/my-super-theme.html:/opt/my-template.html:ro" \
-v "$(pwd)/out:/opt/out:rw" \
-u $(id -u):$(id -g) \
ghcr.io/tarampampam/error-pages:4-builder \
--template /opt/my-template.html \
--out /opt/out \
--index
```
This will generate error pages based on your template in the specified output directory:
```shell
tree ./out/
├── 400.html
├── 401.html
├── 403.html
├── 404.html
├── 405.html
├── 407.html
├── 408.html
├── 409.html
├── 410.html
├── 411.html
├── 412.html
├── 413.html
├── 416.html
├── 418.html
├── 429.html
├── 500.html
├── 502.html
├── 503.html
├── 504.html
├── 505.html
└── index.html
```
```shell
cat ./out/403.html
403
Forbidden: Access is forbidden to the requested page
```