Merge pull request #2 from demisto/contrib-file

first commit to contrib file

CONTRIBUTING.md

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+# Content Contribution Guide
+
+## Contributing Playbooks
+
+Our playbooks are described in an open format which we released called [COPS](https://github.com/demisto/COPS) to drive collaboration and interoperability within the InfoSec community. 
+
+In order to add playbooks you need to save them in the open playbook format(yaml file) and create a Pull Request. 
+
+You can also edit them visually inside the Demisto Platform and export to a yaml file.
+
+Also you can create a PR to modify an existing playbook.
+
+## Contributing Scripts
+
+In addition to the actual scripts in a Py or JS file, you need to add a small section in the scripts.json file, with the script's display name, description, arguments and other metadata. 
+Here is a description of scripts.json fields and structure:
+
+``` json
+{
+            "name": "RemoteExec",
+            "script": "RemoteExec.js",
+            "type": "javascript",
+            "visualScript": "",
+            "tags": ["endpoint"],
+            "arguments": [
+                {
+                    "name": "system",
+                    "description": "Name of system on which to run the command",
+                    "required": true,
+                    "default": false
+                },
+                {
+                    "name": "cmd",
+                    "description": "Command to run",
+                    "required": true,
+                    "default": false
+                }
+            ],
+            "comment": "Execute a command on a remote machine (without installing a D2 agent)",
+            "system": true,
+            "scriptTarget": 0,
+            "dependsOn": { "must": ["ssh"] }
+},
+```
+
+Enjoy and feel free to reach out to us on the DFIRCommunity Slack, or at using this repo issues.
+