About manual build review and Docker image creation

### Related Issue/PR
#7 

### Details
It is necessary to confirm the contents proposed in #7 and determine the policy.

- A preparation for scripts that build manually
- Can or not to create a package with GHA
- Can or not to create a Docker image with GHA
- The location for creating a package
- Isn't it possible to create a package?
- The location for creating a Docker image