aider: Add health check to Dockerfile for Jekyll server.

# Aider chat conversation:

USER: $ bash scripts/run.sh
ruby 3.1.1p18 (2022-02-18 revision 53f5fc4236) [x86_64-linux-musl]
Configuration file: /srv/jekyll/_config.yml
            Source: /srv/jekyll
       Destination: /srv/jekyll/_site
 Incremental build: disabled. Enable with --incremental
      Generating...
                    done in 56.634 seconds.

ASSISTANT: It looks like the Jekyll site is generating successfully. If you need any further changes or encounter any issues, please let me know!

USER: how do i see the site?

ASSISTANT: To see the site, you need to access it via a web browser. The Jekyll server is running inside the Docker container and is exposed on port 4000. You can access it by navigating to `http://localhost:4000` in your web browser.

Here are the steps to follow:

1. Ensure the Docker container is running by executing the `bash scripts/run.sh` command.
2. Open a web browser.
3. Navigate to `http://localhost:4000`.

This should display your Jekyll site. If you encounter any issues, please let me know!

USER: Safari can't open page

ASSISTANT: If Safari can't open the page, it might be due to a few reasons. Let's troubleshoot step-by-step:

1. **Check if the Docker container is running**: Ensure that the Docker container is still running. You can do this by running `docker ps` in your terminal. You should see a container with the name `my-jekyll-site` and the port mapping `0.0.0.0:4000->4000/tcp`.

2. **Check for any errors in the terminal**: Look at the terminal where you ran `bash scripts/run.sh` for any error messages.

3. **Check if the port is correctly exposed**: Ensure that the port 4000 is correctly exposed and mapped to your host machine.

4. **Try accessing the site using a different browser**: Sometimes, browser-specific issues can prevent access. Try using a different browser like Chrome or Firefox.

5. **Check firewall settings**: Ensure that your firewall settings are not blocking port 4000.

If everything seems correct and you still can't access the site, let's add a step to the Dockerfile to ensure the server is running correctly.

Here is an updated `scripts/Dockerfile` to include a health check:

scripts/Dockerfile
```dockerfile
<<<<<<< SEARCH
# Use the official Jekyll image from Docker Hub
FROM jekyll/jekyll:latest

# Set the working directory
WORKDIR /srv/jekyll

# Copy the current directory contents into the container at /srv/jekyll
COPY . /srv/jekyll

# Install any needed packages specified in Gemfile
RUN bundle install

# Expose port 4000 to the host
EXPOSE 4000

# Run Jekyll server
CMD ["jekyll", "serve", "--host", "0.0.0.0"]
=======
# Use the official Jekyll image from Docker Hub
FROM jekyll/jekyll:latest

# Set the working directory
WORKDIR /srv/jekyll

# Copy the current directory contents into the container at /srv/jekyll
COPY . /srv/jekyll

# Install any needed packages specified in Gemfile
RUN bundle install

# Expose port 4000 to the host
EXPOSE 4000

# Health check to ensure the server is running
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s CMD curl -f http://localhost:4000 || exit 1

# Run Jekyll server
CMD ["jekyll", "serve", "--host", "0.0.0.0"]
>>>>>>> REPLACE
```

After updating the Dockerfile, rebuild the Docker image and run the container again:

```sh
bash scripts/build.sh
bash scripts/run.sh
```

Then try accessing `http://localhost:4000` again. If you still encounter issues, please let me know!

scripts/Dockerfile

@@ -13,5 +13,8 @@ RUN bundle install
 # Expose port 4000 to the host
 EXPOSE 4000
 
+# Health check to ensure the server is running
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s CMD curl -f http://localhost:4000 || exit 1
+
 # Run Jekyll server
 CMD ["jekyll", "serve", "--host", "0.0.0.0"]