develop: Makes init task in makefile and corrects readme

[solodynamo]

Related issue

#1507

Proposed changes

• Create the task and correct readme.

Checklist

• I have read the contributing guidelines
• I have read the security policy
• I confirm that this pull request does not address a security vulnerability. If this pull request addresses a security
  vulnerability, I confirm that I got green light (please contact security@ory.sh) from the maintainers to push the changes.
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation within the code base (if appropriate)
• I have documented my changes in the developer guide (if appropriate)

Further comments

[aeneasr]

Suggested change

	go get github.com/ory/go-acc
	GO111MODULE=on go get .
	GO111MODULE=on go install github.com/ory/go-acc

[solodynamo]

@aeneasr pls review.

[aeneasr]

Hi! Thank you for your contribution - just catching up to everything after a vacation :)