Replace string v4 for api in docker container names

docker-compose.yml

@@ -4,7 +4,7 @@ services:
       context: .
       dockerfile: docker/php/Dockerfile
       target: dev
-    container_name: goteo-v4-php
+    container_name: goteo-api-php
     volumes:
       - .:/app
       - ./docker/php/conf.d/openssl.ini:/usr/local/etc/php/conf.d/openssl.ini:ro
@@ -12,7 +12,7 @@ services:
 
   nginx:
     image: nginx:alpine
-    container_name: goteo-v4-nginx
+    container_name: goteo-api-nginx
     volumes:
       - .:/app
       - ./docker/nginx/nginx.conf:/etc/nginx/conf.d/default.conf
@@ -24,7 +24,7 @@ services:
 
   mariadb:
     image: mariadb:10.11.2
-    container_name: goteo-v4-mariadb
+    container_name: goteo-api-mariadb
     volumes:
       - mariadb-data:/var/lib/mysql
     environment: