Support FLOW_CONTEXT override

This needs a recent PHP container image, so if in doubt, start Local
Beach with the `--pull` option if this doesn't work.

assets/project/.localbeach.dist.env

@@ -9,6 +9,15 @@ BEACH_VIRTUAL_HOSTS=${BEACH_PROJECT_NAME_LOWERCASE}.localbeach.net
 # Examples: 8.1 for PHP 8.1.x
 BEACH_PHP_IMAGE_VERSION=8.3
 
+# Change these if you need to adjust the Flow context
+# BEACH_FLOW_BASE_CONTEXT=Production
+# BEACH_FLOW_SUB_CONTEXT=Instance
+
+# if you need a custom Flow context instead of the default
+# ${BEACH_FLOW_BASE_CONTEXT}/Beach/${BEACH_FLOW_SUB_CONTEXT}
+# then you can override FLOW_CONTEXT with
+# FLOW_CONTEXT=Development/Special
+
 # Change these if your Flow setup is not in the project root
 BEACH_FLOW_ROOTPATH=${BEACH_FLOW_ROOTPATH}
 BEACH_APPLICATION_PATH=${BEACH_APPLICATION_PATH}

assets/project/.localbeach.docker-compose.yaml

@@ -20,6 +20,7 @@ services:
       - BEACH_PHP_FPM_HOST=${BEACH_PROJECT_NAME:?Please specify a Beach project name as BEACH_PROJECT_NAME}_php
       - BEACH_FLOW_BASE_CONTEXT=${BEACH_FLOW_BASE_CONTEXT:-Development}
       - BEACH_FLOW_SUB_CONTEXT=${BEACH_FLOW_SUB_CONTEXT:-Instance}
+      - FLOW_CONTEXT=${FLOW_CONTEXT:-}
       - BEACH_PHP_MEMORY_LIMIT=${BEACH_PHP_MEMORY_LIMIT:-750M}
       - BEACH_PERSISTENT_RESOURCES_FALLBACK_BASE_URI=${BEACH_PERSISTENT_RESOURCES_FALLBACK_BASE_URI:-}
       - FLOW_HTTP_TRUSTED_PROXIES=*
@@ -43,6 +44,7 @@ services:
       - BEACH_INSTANCE_NAME=${BEACH_PROJECT_NAME}
       - BEACH_FLOW_BASE_CONTEXT=${BEACH_FLOW_BASE_CONTEXT:-Development}
       - BEACH_FLOW_SUB_CONTEXT=${BEACH_FLOW_SUB_CONTEXT:-Instance}
+      - FLOW_CONTEXT=${FLOW_CONTEXT:-}
       - BEACH_DATABASE_HOST=${BEACH_DATABASE_HOST:-local_beach_database.local_beach}
       - BEACH_DATABASE_PORT=${BEACH_DATABASE_PORT:-3306}
       - BEACH_DATABASE_NAME=${BEACH_PROJECT_NAME}