`v0.1.0` initial roadmap

[AntoniosBarotsis]

This issue will keep track of feature requests planned for the v1.0 release. Most so far are rather small additions so I'll be aggregating them here instead of flooding the repo with issues

New API arguments

• [x] Image size - c0d60c0a3e1b7e37fd427dc8ad24d38b5b1f89c9
• [x] Background color - 05582890dd1117d6b7e82b5e7fd088a1e0367818
• [x] Select a logo from a list of predetermined images - 44e74f4df556a415b586fcb6bc3bcfd5772ad02e

Publish

• [x] Automatically build and publish docker image(s) on release
• [x] Automatically build and publish lib on crates.io

Testing

• [x] Write some server tests
• [x] Write some lib tests
• [x] Automate code coverage reporting

Other

• [x] Keep track of the MSRV

[AntoniosBarotsis]

Moving to the project.