Add installation instructions in README #315

	# This workflow uses actions that are not certified by GitHub.
	# They are provided by a third-party and are governed by
	# separate terms of service, privacy policy, and support
	# documentation.

	name: flawfinder

	on:
	push:
	branches: [ "main" ]
	pull_request:
	# The branches below must be a subset of the branches above
	branches: [ "main" ]
	schedule:
	- cron: '29 5 * * 1'

	jobs:
	flawfinder:
	name: Flawfinder
	runs-on: ubuntu-latest
	permissions:
	actions: read
	contents: read
	security-events: write
	steps:
	- name: Checkout code
	uses: actions/checkout@v3

	- name: flawfinder_scan
	uses: david-a-wheeler/flawfinder@8e4a779ad59dbfaee5da586aa9210853b701959c
	with:
	arguments: '--sarif ./'
	output: 'flawfinder_results.sarif'

	- name: Upload analysis results to GitHub Security tab
	uses: github/codeql-action/upload-sarif@v2
	with:
	sarif_file: ${{github.workspace}}/flawfinder_results.sarif

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