Downgrade docker-compose to 2.2.

#1570 implemented docker compose configuration for resolving #1452.
Older docker-compose instances might not support 3.9 docker-compose
configuration. This PR downgrades to 2.2 by removing the "profile"
configuration.

docker-compose.yml

@@ -1,4 +1,4 @@
-version: "3.9"
+version: "2.2"
 
 services:
     # RUN SCHOLIA ALONE 
@@ -9,15 +9,11 @@ services:
             - 8100:8100
         volumes: 
             - .:/scholia
-        profiles:
-            - local
 
     # RUN SCHOLIA WITH NGINX
     webapp_proxy:
         image: scholia
         build: .
-        profiles:
-            - proxy
         volumes: 
             - .:/scholia
 
@@ -26,10 +22,5 @@ services:
         build: ./nginx/
         ports:
             - 80:80
-        profiles:
-            - proxy
         depends_on: 
             - webapp_proxy
-
-
-