Using GITHUB_TOKEN inside Docker to run Maven on GHA

Question

Context:

I have a Github Action (GHA) that creates a Docker image and send it to AWS.

This image contains a Java application that is built with Maven and have a dependency from Github Packages, which is only accessible using a personal github token (or a generic github token on GHA).

Running my application locally (without docker), I should setup my maven settings.xml to use my personal github user and token.

Maven settings.xml file, inside user/.m2 directory:

<settings>
    ....
    <servers>
    <server>
      <id>github</id>
      <username>USER</username>
      <password>TOKEN</password>
    </server>
  </servers>
</settings>

Running with Docker, I copy this settings.xml to docker and it works.

    FROM eclipse-temurin:17-jdk-focal

    WORKDIR /app

    RUN mkdir -p /root/.m2 \
        && mkdir /root/.m2/repository
    COPY settings.xml /root/.m2
   
    RUN ./mvnw dependency:go-offline
    ....
   
    CMD ["./mvnw", "spring-boot:run"]

Running with GHA, I saved my personal user/token in secrets and used it on this settings.xml

  - name: exchange secrets on settings.xml
  env:
    GH_PERSONAL_USER: ${{ secrets.GH_PERSONAL_USER }}
    GH_PERSONAL_TOKEN: ${{ secrets.GH_PERSONAL_TOKEN }}
  run: envsubst < settings.xml.j2 > settings.xml

Some docs I found, but didn't help me:

• github_token in a workflow
• authenticate to a GitHub Packages registry within a GitHub Actions workflow

My problem/question:

I don't want to store/use my personal user/token as a secret on this repository, and I know that Github have a secrets.GITHUB_TOKEN for these cases, but I don't know how to use it on maven settings.xml file, that requires a token and user.

Is there a way to use this secrets.GITHUB_TOKEN?