Removing static IPs to avoid conflicts with sharing_gitlab

During the last reboot of the development server, sharing_gitlab was unable to startup because of conflicting IPs.

This MR tries to mitigate this problem in the future by removing static IPs for the other sharing services.

Involved services:

• elasticsearch
• Gitlab (changes in file-hooks repo)

src/main/docker/elasticsearch.yml

@@ -25,8 +25,7 @@ services:
         soft: -1
         hard: -1
     networks:
-      backend:
-        ipv4_address: 172.22.2.24
+      - backend
   # kibana:
   #   depends_on:
   #     - sharing_elasticsearch