ci: configure CD workflow to deploy to remote Docker host and document test environment

.gitea/workflows/cd.yml

@@ -41,6 +41,8 @@ jobs:
           EOF
 
       - name: Deploy with docker-compose
+        env:
+          DOCKER_HOST: tcp://192.168.88.40:2375
         run: |
           docker compose -f docker-compose.prod.yml pull
           docker compose -f docker-compose.prod.yml up -d --remove-orphans
@@ -48,9 +50,11 @@ jobs:
       - name: Health check
         run: |
           sleep 10
-          curl -f http://localhost:3000/health || exit 1
-          curl -f http://localhost:8081/health || exit 1
+          curl -f http://192.168.88.40:3000/health || exit 1
+          curl -f http://192.168.88.40:8081/health || exit 1
 
       - name: Cleanup old images
+        env:
+          DOCKER_HOST: tcp://192.168.88.40:2375
         run: |
           docker image prune -f --filter "until=24h"