Add appservices component to docker scripts (#1153)

Signed-off-by: Ashley Nelson <amn@fantashley.com>

build/docker/docker-compose.polylith.yml

@@ -163,6 +163,20 @@ services:
     networks:
         - internal
 
+  appservice_api:
+    hostname: appservice_api
+    image: matrixdotorg/dendrite:appservice
+    command: [
+      "--config=dendrite.yaml"
+    ]
+    volumes:
+      - ./config:/etc/dendrite
+    networks:
+      - internal
+    depends_on:
+      - room_server
+      - user_api
+
 networks:
   internal:
     attachable: true