Getting ClassNotFoundException even when added custom class to classpath

General Discussion
1

I am trying to run a custom task by implementing customChange.
Here are my files:
Dockerfile

FROM liquibase:4.29

WORKDIR /node-app
USER root
COPY . .
RUN apt update -y
RUN apt install default-jdk -y
RUN javac -cp /liquibase/internal/lib/liquibase-core.jar RunCustomCommand.java
RUN jar cf run-custom-command.jar RunCustomCommand.class


CMD [ "sh" ]

RunCustomCommand.java

package com.example;

import liquibase.change.custom.CustomTaskChange;
import liquibase.database.Database;
import liquibase.exception.CustomChangeException;
import liquibase.exception.SetupException;
import liquibase.exception.ValidationErrors;
import liquibase.resource.ResourceAccessor;

public class RunCustomCommand implements CustomTaskChange {

    private ResourceAccessor resourceAccessor;

    @Override
    public void execute(Database database) throws CustomChangeException {
        System.out.printf("Hello %s!", "World");
    }

    @Override
    public String getConfirmationMessage() {
        return "Custom task executed successfully.";
    }

    @Override
    public void setUp() throws SetupException {
        // Any setup logic here
    }

    @Override
    public void setFileOpener(ResourceAccessor resourceAccessor) {
        this.resourceAccessor = resourceAccessor;
    }

    @Override
    public ValidationErrors validate(Database database) {
        return new ValidationErrors();
    }
}

changelog.xml

<databaseChangeLog
    xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
    xmlns:pro="http://www.liquibase.org/xml/ns/pro"
    xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog
        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd
        http://www.liquibase.org/xml/ns/dbchangelog-ext
        http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd
        http://www.liquibase.org/xml/ns/pro
        http://www.liquibase.org/xml/ns/pro/liquibase-pro-latest.xsd">

    <changeSet id="21" author="nvoxland">
        <customChange class="com.example.RunCustomCommand">
        </customChange>
    </changeSet>

</databaseChangeLog>

docker-compose.yml

version: "3.1"

services:
  lobo-liquibase:
    container_name: test-liquibase
    build:
      context: ./
      dockerfile: Dockerfile
    command: update --classpath=/node-app/run-custom-command.jar --changelog-file=changelog.xml --username=postgres --password=postgres --url=jdbc:postgresql://db:5432/postgres
    networks:
      - test-liqui
networks:
  test-liqui:

However, I always get this error

test-liquibase  | ERROR: Exception Details
test-liquibase  | ERROR: Exception Primary Class:  ClassNotFoundException
test-liquibase  | ERROR: Exception Primary Reason:  com.example.RunCustomCommand
test-liquibase  | ERROR: Exception Primary Source:  PostgreSQL 11.22
test-liquibase  | 
test-liquibase  | Unexpected error running Liquibase: com.example.RunCustomCommand

I have been stuck with this for a week now, is there anything wrong with my setup?

2

bump, I tried to run it without Docker and still get the same issue