Merge branch 'add-install-instructions' into 'develop'

Add install instructions

See merge request !33
7 jobs for develop in 9 minutes and 53 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Metrics
passed #3250
php-metrics

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  Metrics Build
passed #3251
php-metrics-build

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  Metrics Deploy
passed #3252
php-metrics-deploy

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  Install
passed #3253
install

00:01:45

 
  Test
passed #3254
phpunit

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  Build
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build

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  Deploy
passed #3256
deploy

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