Update README to include build instructions

[Mentors4EDU]

Hi, please use the command docker build -t ubuntu-test:latest . over the docker build Dockerfile command or update the contexts, please see here

[Mentors4EDU]

Yeah it looks like it needs to be tagged to run correctly or the docker build Dockerfile won't run well.

See screenshot below:

[maebeam]

Where do you see a reference to docker build Dockerfile?

[Mentors4EDU]

Hi @maebeam I'm not quite sure. I believe I seen it somewhere but forgot. Either way, please add the docker build -t ubuntu-test:latest command to the README so that people don't use the other command by default.

[bloated-devish]

https://github.com/bitclout/mongodb-dumper suggests docker build to be run.