title: Permission denied: '/var/lib/pgadmin/sessions' in Docker
body: <p>I have got the same problem described in this <a href="https://stackoverflow.com/questions/46707935/oserror-errno-13-permission-denied-var-lib-pgadmin">post</a>, but inside a docker container.
  I don't really know where my pgadmin file reside to edit it's default path.How do I go about fixing this issue? Please be as detailed as possible because I don't know how to docker.</p>
  <p>Here is an abstract of the verbatim of <code>docker-compose up</code> command:</p>
  <pre><code>php-worker_1  | 2020-11-11 05:50:13,700 INFO spawned: 'laravel-worker_03' with pid 67
  pgadmin_1     | [2020-11-11 05:50:13 +0000] [223] [INFO] Worker exiting (pid: 223)
  pgadmin_1     | WARNING: Failed to set ACL on the directory containing the configuration database:
  pgadmin_1     |            [Errno 1] Operation not permitted: '/var/lib/pgadmin'
  pgadmin_1     | HINT   : You may need to manually set the permissions on
  pgadmin_1     |          /var/lib/pgadmin to allow pgadmin to write to it.
  pgadmin_1     | ERROR  : Failed to create the directory /var/lib/pgadmin/sessions:
  pgadmin_1     |            [Errno 13] Permission denied: '/var/lib/pgadmin/sessions'
  pgadmin_1     | HINT   : Create the directory /var/lib/pgadmin/sessions, ensure it is writeable by
  pgadmin_1     |          'pgadmin', and try again, or, create a config_local.py file
  pgadmin_1     |          and override the SESSION_DB_PATH setting per
  pgadmin_1     |          https://www.pgadmin.org/docs/pgadmin4/4.27/config_py.html
  pgadmin_1     | /usr/local/lib/python3.8/os.py:1023: RuntimeWarning: line buffering (buffering=1) isn't supported in binary mode, the default buffer size will be used
  pgadmin_1     |   return io.open(fd, *args, **kwargs)
  pgadmin_1     | [2020-11-11 05:50:13 +0000] [224] [INFO] Booting worker with pid: 224
  </code></pre>
  <p>my docker-compose.yml:</p>
  <pre><code>  ### pgAdmin ##############################################
    pgadmin:
      image: dpage/pgadmin4:latest
      environment:
        - &quot;PGADMIN_DEFAULT_EMAIL=${PGADMIN_DEFAULT_EMAIL}&quot;
        - &quot;PGADMIN_DEFAULT_PASSWORD=${PGADMIN_DEFAULT_PASSWORD}&quot;
      ports:
        - &quot;${PGADMIN_PORT}:80&quot;
      volumes:
        - ${DATA_PATH_HOST}/pgadmin:/var/lib/pgadmin
      depends_on:
        - postgres
      networks:
        - frontend
        - backend
  </code></pre>