Adding gitleaks job

# 🔐 Gitleaks

## Description

[Gitleaks](https://github.com/zricethezav/gitleaks/wiki/Scanning) is a tool

made to detect hardcoded secrets like passwords, api keys and tokens in git

repos. As it written in go, it is much faster than most of the 

[alternatives](https://github.com/zricethezav/gitleaks/wiki/Comparison-with-other-tools).

## How to use it

1. Add the corresponding URL to your `.gitlab-ci.yml` file (see [Getting

   started](/getting-started)). Example:

    ```yaml

    include:

      - remote: 'https://jobs.go2scale.io/gitleaks.yml'

    ```

2. Well done, your job is ready to work ! 😀

## Job details

* Job name: `gitleaks`

* Docker image:

[`python:3.6-stretch`](https://hub.docker.com/r/_/python)

* Default stage: `static_tests`

* When: `always`

stages:

  - static tests

# From https://github.com/pmarlow/ci_secrets/blob/master/example.gitlab-ci.yml

gitleaks:

  image: python:3.6-stretch

  before_script:

    - pip install ci_secrets

  script:

    - if [ ! -z ${CI_MERGE_REQUEST_ID	} ]; then

    -   ci_secrets --since origin/$CI_MERGE_REQUEST_TARGET_BRANCH_NAME --log INFO

    - else

    -   ci_secrets --since $CI_COMMIT_BEFORE_SHA --log INFO

    - fi

name: gitleaks

description: A secret detection job using gitleaks to alert on secrets being pushed

default_stage: static_tests

icon: 🔐

maintainer: FulcrandG

license: MIT

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* Initial version

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