chore: добавить CI/CD для прод-деплоя

- добавлены Gitea workflows для CI и ручного CD

- настроен prod compose для запуска за reverse proxy

- добавлена публикация Caddy image в Container Registry

- обновлена документация по CI/CD и prod-сети

docker-compose.yml

@@ -15,12 +15,13 @@ services:
       - gateway
 
   caddy:
+    image: ${CADDY_IMAGE:-image-gateway-caddy:local}
     build:
       context: .
       dockerfile: Dockerfile.caddy
     restart: unless-stopped
-    ports:
-      - "${CADDY_PORT:-80}:${CADDY_PORT:-80}"
+    expose:
+      - "${CADDY_PORT:-80}"
     volumes:
       - ./Caddyfile:/etc/caddy/Caddyfile:ro
       - caddy-data:/data
@@ -35,11 +36,17 @@ services:
       imgproxy:
         condition: service_started
     networks:
-      - gateway
+      gateway:
+      web:
+        aliases:
+          - image-gateway
 
 networks:
   gateway:
     driver: bridge
+  web:
+    external: true
+    name: ${WEB_NETWORK:-web}
 
 volumes:
   caddy-data: