Fixed the issues reported while testing #7330.

Author: yogeshmahajan-1903

docs/en_US/container_deployment.rst

@@ -142,12 +142,14 @@ Override the default file path for the preferences customization at the containe
 /pgadmin4/preferences.json mapped file below for more information. See the format
 of the `Preferences JSON file <https://www.pgadmin.org/docs/pgadmin4/latest/preferences.html#json-format>`_.
 
-**PGADMIN_CONFIG_DISTRO_FILE**
+**PGADMIN_CUSTOM_CONFIG_DISTRO_FILE**
 
 *Default: /pgadmin4/config_distro.py*
 
 Override the default file path for the pgadmin configurations file.This can be used while provisioning
-container with read only root file system to achieve a more secure pgadmin4 deployment for docker and kubernetes.
+container with read only root file system to achieve a more secure pgadmin4 deployment for kubernetes.
+Note that if you are externally mapping this file, then environment variables passed using PGADMIN_CONFIG_
+suffix will be ignored.
 
 **PGPASS_FILE**
 

pkg/docker/entrypoint.sh

@@ -37,8 +37,7 @@ fi
 file_env PGADMIN_DEFAULT_PASSWORD
 
 # TO enable custom path for config_distro, pass config distro path via environment variable.
-export CONFIG_DISTRO_FILE_PATH="${PGADMIN_CONFIG_DISTRO_FILE:-/pgadmin4/config_distro.py}"
-
+export CONFIG_DISTRO_FILE_PATH="${PGADMIN_CUSTOM_CONFIG_DISTRO_FILE:-/pgadmin4/config_distro.py}"
 # Populate config_distro.py. This has some default config, as well as anything
 # provided by the user through the PGADMIN_CONFIG_* environment variables.
 # Only update the file on first launch. The empty file is created during the