Networks: create internal docker network for proxy server

Prepare to use caddy in docker

files/keycloak/docker-compose.yml.j2

@@ -12,12 +12,18 @@ services:
     container_name: keycloak_app
     command: ["start-dev"]
     restart: unless-stopped
+    ports:
+      - "127.0.0.1:{{ keycloak_port }}:8080"
+    networks:
+      - "{{ web_proxy_network }}"
+    volumes:
+      - "./data:/opt/keycloak/data"
     environment:
       KEYCLOAK_ADMIN: "{{ keycloak_admin_login }}"
       KEYCLOAK_ADMIN_PASSWORD: "{{ keycloak_admin_password }}"
       KC_HOSTNAME_URL: "https://kk.vakhrushev.me"
       KC_HOSTNAME_ADMIN_URL: "https://kk.vakhrushev.me"
-    ports:
-      - "127.0.0.1:{{ keycloak_port }}:8080"
-    volumes:
-      - "./data:/opt/keycloak/data"
+
+networks:
+  {{ web_proxy_network }}:
+    external: true