Fix bind host value setup for data service.

Add env var HOST to data-service Docker config, as the entrypoint script
requires this in the environment; having this Docker env var be sourced
from a DMOD deployment env var DOCKER_DATA_SERVICE_LISTEN_HOST (or fall
back to default of 0.0.0.0) and adding this new DMOD env var to
example.env.

docker/main/docker-deploy.yml

@@ -165,6 +165,7 @@ services:
       - SSL_DIR=/ssl/data-service
       - OBJECT_STORE_HOST=${DMOD_DATA_SERVICE_OBJ_STORE_HOST:-minio-proxy}
       - REDIS_HOST=${DOCKER_REDIS_SERVICE_ALIAS:-myredis}
+      - HOST=${DOCKER_DATA_SERVICE_LISTEN_HOST:-0.0.0.0}
       # computed or optional variables. optional vars have associated default value
       # - S3FS_URL_PROTOCOL='http'
       # - S3FS_URL_HOST
@@ -173,7 +174,6 @@ services:
       # - S3FS_VOL_IMAGE_TAG='latest'
       # - S3FS_PLUGIN_ALIAS='s3fs'
       # - S3FS_HELPER_NETWORK='host'
-      # - HOST # computed with `hostname`
       # - REDIS_PORT=6379
       # - OBJECT_STORE_PORT=9000
       # debugging configuration

example.env

@@ -400,6 +400,9 @@ DOCKER_GUI_MAAS_ENDPOINT_HOST=nwm-master_request-service
 ## The listening port for websocket communication for the dataservice container
 DOCKER_DATASERVICE_CONTAINER_PORT=3020
 
+# The bind host value for the service, passed as an arg to uvicorn in the entrypoint script
+#DOCKER_DATA_SERVICE_LISTEN_HOST=
+
 ## The bound port on the host for the GUI stack web server service container.
 ## Essentially, this is the port where the application can be accessed.
 ## This is handled by default in the compose file if not set.