# Docker Image Build: Almalinux Docker-in-Docker

This project provides a reproducible Docker image build process for `almalinux:8.10`, with custom YUM repository configurations and package installations. The build is automated using a `Makefile` and managed via CI tasks to ensure consistent and reliable Docker image builds.

## Makefile Overview

The `Makefile` provides several targets to automate building, tagging, and pushing Docker images. The Docker image is tagged with the current Git commit hash, the current date, and a `latest` tag for easy reference.

## Makefile Targets

### Build the Docker Image

To build the Docker image without tags:

```bash
make build
```

This will use the `docker build` command with `--network=host` to build the image with the name `git.query.consul/unkin/almalinux8-runnerdnd`.

### Tag the Docker Image

To tag the Docker image with the Git commit hash, the current date, and a `latest` tag:

```bash
make tag
```

This will add three tags to the image:
- `git.query.consul/unkin/almalinux8-runnerdnd:<GIT_COMMIT>`
- `git.query.consul/unkin/almalinux8-runnerdnd:<DATE_TAG>`
- `git.query.consul/unkin/almalinux8-runnerdnd:latest`

### Push the Docker Image

To push the tagged Docker images to the registry:

```bash
make push
```

> **Note**: The `push` command is currently commented out for safety. To enable pushing, remove the comment (`#`) from the `docker push` lines in the `push` target.

### Clean Up

To clean up any dangling Docker images:

```bash
make clean
```

This will remove any dangling (unused) Docker images using `docker image prune -f`.

### Default Target

The default target is `build`. So running:

```bash
make
```

is equivalent to running `make build`.

## Development and Testing

To test or develop with this `Makefile`, follow these steps:

1. **Clone the repository** and navigate to the project directory:
   ```bash
   git clone https://git.query.consul/unkin/docker-almalinux-runnerdnd.git
   cd docker-almalinux-runnerdnd
   ```

2. **Build the Docker image** using the `build` target:
   ```bash
   make build
   ```

3. **Tag the image** with the commit hash, date, and latest tag:
   ```bash
   make tag
   ```

4. **(Optional)** Modify the `push` target to enable pushing the image to your Docker registry:
   Uncomment the lines in the `push` target:
   ```makefile
   docker push $(REGISTRY)/$(OWNER)/$(IMAGE_NAME):$(GIT_COMMIT)
   docker push $(REGISTRY)/$(OWNER)/$(IMAGE_NAME):$(DATE_TAG)
   docker push $(REGISTRY)/$(OWNER)/$(IMAGE_NAME):latest
   ```

5. **Test your changes** locally by running the `clean` target:
   ```bash
   make clean
   ```