Rename services

See coop-cloud/organising#19

compose.yml

@@ -2,7 +2,7 @@
 version: "3.8"
 
 services:
-  keycloak:
+  app:
     image: "jboss/keycloak:9.0.3"
     networks:
       - proxy
@@ -11,7 +11,7 @@ services:
       - admin_passwd
       - db_passwd
     environment:
-      - DB_ADDR=mariadb
+      - DB_ADDR=db
       - DB_DATABASE=keycloak
       - DB_PASSWORD_FILE=/run/secrets/db_passwd
       - DB_USER=keycloak
@@ -41,7 +41,7 @@ services:
         - "traefik.http.middlewares.${STACK_NAME}-redirect.headers.SSLForceHost=true"
         - "traefik.http.middlewares.${STACK_NAME}-redirect.headers.SSLHost=${DOMAIN}"
 
-  mariadb:
+  db:
     image: "mariadb:10.5"
     environment:
       - MYSQL_DATABASE=keycloak