FIX: formato de build explicito y version para compatibilidad con Portainer

docker-compose.yml

@@ -1,6 +1,10 @@
+version: "3.8"
+
 services:
   web:
-    build: .
+    build:
+      context: .
+      dockerfile: Dockerfile
     command: gunicorn config.asgi:application -k uvicorn.workers.UvicornWorker --bind 0.0.0.0:8000 --workers 3
     restart: unless-stopped
     environment:
@@ -34,7 +38,9 @@ services:
     mem_limit: 512m
 
   celery:
-    build: .
+    build:
+      context: .
+      dockerfile: Dockerfile
     command: celery -A config worker -l info --concurrency=2
     restart: unless-stopped
     environment:
@@ -46,7 +52,9 @@ services:
     mem_limit: 512m
 
   tax-api:
-    build: ./tax_api
+    build:
+      context: ./tax_api
+      dockerfile: Dockerfile
     restart: unless-stopped
     networks:
       - internal