New Script: Mattermost (#1856)

* Create mattermost.sh, mattermost-install.sh, and mattermost.json

* Change paths in build.func install.func and mattermost.sh

This commit is for testing purposes and will be reverted before creating the pull request.

* Fixed OS in mattermost.sh and mattermost.json

* Change paths in all files

Points all files to my fork for testing.

* Added tags and fixed missing variable definition

* Fixed mattermost-install.sh

* Fixed sed command in mattermost-install.sh

* Fixed sed command in mattermost-install.sh

* Fixed broken config in mattermost-install.sh

* Revert "Change paths in all files"

This reverts commit 2f93e39233a8dc27c5f4f77d5b84eba9fea34b61.

* Revert "Change paths in build.func install.func and mattermost.sh"

This reverts commit 084c71fbdc4ae6abed09f6858b852967286bb092.

* Fixed date in mattermost.json

* Update install/mattermost-install.sh

Co-authored-by: Michel Roegl-Brunner <73236783+michelroegl-brunner@users.noreply.github.com>

* Update mattermost.json

---------

Co-authored-by: CanbiZ <47820557+MickLesk@users.noreply.github.com>
Co-authored-by: Michel Roegl-Brunner <73236783+michelroegl-brunner@users.noreply.github.com>

json/mattermost.json

@@ -0,0 +1,34 @@
+{
+    "name": "Mattermost",
+    "slug": "mattermost",
+    "categories": [
+        25
+    ],
+    "date_created": "2025-01-30",
+    "type": "ct",
+    "updateable": false,
+    "privileged": false,
+    "interface_port": 8065,
+    "documentation": null,
+    "website": "https://mattermost.com/",
+    "logo": "https://avatars.githubusercontent.com/u/9828093?s=200&v=4",
+    "description": "Mattermost is an open source platform for secure collaboration across the entire software development lifecycle. It's written in Go and React and runs as a single Linux binary with MySQL or PostgreSQL. It has a slimilar interface and features to Slack or Discord.",
+    "install_methods": [
+        {
+            "type": "default",
+            "script": "ct/mattermost.sh",
+            "resources": {
+                "cpu": 1,
+                "ram": 2048,
+                "hdd": 8,
+                "os": "ubuntu",
+                "version": "24.04"
+            }
+        }
+    ],
+    "default_credentials": {
+        "username": null,
+        "password": null
+    },
+    "notes": []
+}