fix(docker compose): must use 2.3 as we have features removed in 3 (#1679)

docker-compose-speckle.yml

@@ -1,4 +1,4 @@
-version: '3'
+version: '2.3'
 services:
   speckle-frontend:
     build:

utils/1click_image_scripts/template-docker-compose.yml

@@ -1,4 +1,4 @@
-version: '3'
+version: '2.3'
 services:
   ####
   # Speckle Server dependencies