Readability: The transparent version of the Stratospheric Technical Architecture Image in the README.md is not readable on a dark mode background. Use the non-transparent image instead

[shantdashjian]

User Story:

• In order to easily understand the Stratospheric system architecture we will build following the book, the course, or both
• As a learner
• I want to be able to easily view the technical architecture image included in the README.md

Description: The transparent version of the Stratospheric Technical Architecture image in the READMe.md is not readable for users with a dark mode GitHub settings.

Steps to Reproduce:

1. Login to your GitHub.
2. Make your theme dark mode by changing it in Settings > Appearance.
3. Visit the stratospheric GitHub repo (this repo).
4. Scroll down to the section in the README.md where it says "What We're Going to Build.

Current Behavior: The image is transparent and thus the details of the architecture are not easily visible on a dark mode theme background.

Expected Behavior: The details of the technical architecture should be readable on any background.

Fix: Use the non-transparent version of the image rather than the transparent one. This will guarantee the image will look good in all modes. I will submit a PR to fix this issue.

[BjoernKW]

Thanks a lot for bringing this up and for readily providing a pull request. I've just merged your pull request.

[shantdashjian]

Thanks a lot for bringing this up and for readily providing a pull request. I've just merged your pull request.

You're welcome @BjoernKW.