fix: Add an environment variable for gitlab url

.env.test

@@ -8,3 +8,4 @@ POSTGRES_USER=root
 SLACK_BOT_USER_O_AUTH_ACCESS_TOKEN=SLACK_BOT_USER_O_AUTH_ACCESS_TOKEN
 SLACK_SIGNING_SECRET=SLACK_SIGNING_SECRET
 EMAIL_DOMAINS=my-domain.com,ext.my-domain.com
+GITLAB_URL=https://my.domain.com

README.md

@@ -203,11 +203,16 @@ Create a `.env` file containing the following variables:
     ![OAuth token](docs/assets/slack/oauth-token.png)
 
 - `EMAIL_DOMAINS`
+
   Email domains of your organization (separated by comma),
   for instance `my-domain.com,ext.my-domain.com`.
   Used to find Slack users from Gitlab username.
   Note that this means your org has to use the same naming scheme for emails and gitlab username.
 
+- `GITLAB_URL`
+
+  The gitlab url of your organization
+
 If you want Homer to connect to an **external PostgreSQL database**, you can set
 the following variables:
 

src/constants.ts

@@ -1,12 +1,13 @@
 import type { GitlabMergeRequestState } from '@/core/typings/GitlabMergeRequest';
+import { getEnvVariable } from '@/core/utils/getEnvVariable';
 
 export const CHANNEL_NOT_FOUND_SLACK_ERROR = 'channel_not_found';
 export const EXPIRED_TRIGGER_ID_ERROR_MESSAGE =
   'D’oh! It looks like I took too much time to respond for Slack, could you retry your command? :homer-donut:';
 export const EXPIRED_TRIGGER_ID_SLACK_ERROR = 'expired_trigger_id';
 export const GENERIC_ERROR_MESSAGE =
   "D'oh! Something went wrong :homer-stressed: You will probably find more information on the error on <https://app.datadoghq.eu/logs?cols=host%2Cservice&live=true&messageDisplay=inline&query=service%3A%2Ahomer%2A%20%40env%3Asupport&index=%2A&stream_sort=desc|Datadog>.";
-export const GITLAB_URL = 'https://git.manomano.tech';
+export const GITLAB_URL = getEnvVariable('GITLAB_URL');
 export const HOMER_GITLAB_URL = `${GITLAB_URL}/tools/homer`;
 export const HTTP_STATUS_NO_CONTENT = 204;
 export const HTTP_STATUS_OK = 200;