cicd: only run tests as part of go test not as part of container build.

During the container build the tests run in an isolated environment. In order to make them pass functionality like `--add-host=host.docker.internal:host-gateway` should be used but then part of the build.

For now we just have tests run on the Ubuntu host from Github actions.

Dockerfile

@@ -12,7 +12,9 @@ WORKDIR /usr/src/fakes3pp
 RUN go mod download
 RUN go mod tidy
 ADD . /usr/src/fakes3pp/
-RUN go test -coverprofile cover.out ./...
+#TODO: run tests in container build after github actions build can access the testing S3 backend endpoints.
+# for now we just do test coverage in another job which is a dependency of the actual build to make sure tests pass.
+#RUN go test -coverprofile cover.out ./...
 RUN go vet
 RUN CGO_ENABLED=0 GOOS=linux go build -o main .