use postgresql and pgAdmin in docker

docker-compose.yml

version: "3.4"

services:
    pgAdmin:
        restart: always
        image: dpage/pgadmin4
        ports:
            - "8000:80"
        environment:
            PGADMIN_DEFAULT_EMAIL: [email protected]
            PGADMIN_DEFAULT_PASSWORD: 1234
        volumes:
            - pgadmin:/var/lib/pgadmin
    postgres:
        restart: always
        image: postgres
        container_name: "postgres_container"
        ports:
            - "5432:5432"
        environment:
            POSTGRES_USER: me
            POSTGRES_PASSWORD: 1234
            POSTGRES_DB: testDb
        volumes:
            - pgvol:/var/lib/postgresql/data
volumes:
    pgvol:
    pgadmin: 

hi, not sure if this is forum for a question, if not please let me know.
I am new to docker, and wonder if those host volumes (i.e. pgvol & pgadmin) are relative paths?

@silvesterkkk, you can use relative paths as well.
https://stackoverflow.com/questions/54322675/relative-path-binding-in-docker-for-volumes-in-macos-does-fail

Thank you, appreciate getting back to me.

UPDATE

I wrote a new article on Setting Up CloudNativePG on KIND with pgAdmin