[ci] Remove the docker-based CI files (#95)

Before we started using GH Actions, the CI was based on docker compose
files.
This PR removes these Dockerfile and Docker compose definitions.

Author: sebsto

.gitignore

@@ -10,4 +10,5 @@ xcuserdata
 Package.resolved
 .serverless
 .devcontainer
-.amazonq
+.amazonq
+.ash