docker-compose.yaml: Add "lava-ser2net" and "ser2net" aliases

While we'd like to retain upstream service name, "lava-dispatcher-ser2net",
we need to refer to it by following hostnames:

lava-ser2net - new hostname, consistent with lava-dispatcher
ser2net - legacy hostname, which may be used in existing user's board configs

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>

Author: pfalcon

docker-compose.yaml

@@ -174,6 +174,8 @@ services:
       - worker-tftp:/srv/tftp
 
   lava-dispatcher-ser2net:
+    # Required, lite-lava-docker-compose scripts use "lava-ser2net" hostname.
+    container_name: lava-ser2net
     build:
       context: ./ser2net
     environment:
@@ -190,6 +192,12 @@ services:
     devices: []
     ports:
       - 7101:7101
+    networks:
+      default:
+        aliases:
+        # Existing board configs that users have around, may still refer to
+        # the older hostname, "ser2net", so we add it as an alias here.
+        - ser2net
 
   lava-dispatcher-nfs:
     build: