ALT tags needed for ChRIS website images

[mairin]

Accessibility: The following images to do not have an ALT tag to provide a screen reader information about the image: Image without ALT attribute Found on page https://chrisproject.org/assets/images/illus_collaborate.png /about https://chrisproject.org/assets/images/icons/role-docs.png /join-us https://chrisproject.org/assets/images/illus_data.png /about https://chrisproject.org/assets/images/demo_feed.jpg /demo https://chrisproject.org/assets/images/icons/role-marketing.png /join-us https://chrisproject.org/assets/images/icons/role-design.png /join-us https://chrisproject.org/assets/images/icons/role-backend.png /join-us https://chrisproject.org/assets/images/icons/tech-openstack.png /join-us https://chrisproject.org/assets/images/thumb_chris-store.jpg / https://chrisproject.org/assets/images/join.png /join-us https://chrisproject.org/assets/images/icons/tech-django.png /join-us https://chrisproject.org/assets/images/icons/tech-kube.png /join-us https://chrisproject.org/assets/images/icons/role-qa.png /join-us https://chrisproject.org/assets/images/demo_login.jpg /demo https://chrisproject.org/assets/images/thumb_creating-chris.jpg / https://chrisproject.org/assets/images/demo_output.jpg /demo https://chrisproject.org/assets/images/illus_compute.png /about https://chrisproject.org/assets/images/demo_feeds.jpg /demo https://chrisproject.org/assets/images/icons/tech-python.png /join-us https://chrisproject.org/assets/images/icons/role-frontend.png /join-us https://chrisproject.org/assets/images/icons/tech-react.png /join-us https://chrisproject.org/assets/images/icons/tech-js.png /join-us

see https://github.com/FNNDSC/website/issues/20

[ChitvanRamani22]

@mairin could you please assign this to me

[ChitvanRamani22]

@mairin is this repository a part of outreachy 2021?

[archijaiswal]

Hi, could you please assign this issue to me? I'm an Outreachy applicant, looking for good-first-issues to get comfortable with the project. @mairin @jennydaman