auto clone third party addons and upgrade docker build

.env.example

@@ -8,9 +8,10 @@ UPDATE=
 LOAD=base,web
 ROOT_PATH=/usr/lib/python3/dist-packages/odoo
 WORKERS=0
-DEV_MODE=reload,xml
 DOMAIN=erp.odoocker.test
 ADMIN_PASSWD=odoo
+# Use reload,xml to enable hot reload in python and xml files
+DEV_MODE=
 
 # Services
 PROJECT_NAME=odoocker
@@ -22,10 +23,14 @@ USE_S3=false
 USE_SENTRY=false
 USE_PGADMIN=false
 
-# Enterprise
+# GitHub user and access token to clone private repositories
 GITHUB_USER=
 GITHUB_ACCESS_TOKEN=
 
+# GitHub user and access token to clone Enterprise repository
+ENTERPRISE_USER=${GITHUB_USER}
+ENTERPRISE_ACCESS_TOKEN=${GITHUB_ACCESS_TOKEN}
+
 # Database
 DB_HOST=postgres
 DB_PORT=5432