VS Code, for some languages, is most definitely an IDE. Refactoring tools, integrated debugger, code intelligence, source control client, remote interpreters, build/deploy tools, test runner, integrated terminal, support for linters/formatters, etc. Not sure how it doesn't qualify as an "Integrated Development Environment" at that point. Sounds quite integrated to me.
Vagrant is a VM provisioning tool, not a container runtime. Docker is the de-facto container standard for now, so yes, Docker specifically is definitely a thing to get familiar with.
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VS Code, for some languages, is most definitely an IDE. Refactoring tools, integrated debugger, code intelligence, source control client, remote interpreters, build/deploy tools, test runner, integrated terminal, support for linters/formatters, etc. Not sure how it doesn't qualify as an "Integrated Development Environment" at that point. Sounds quite integrated to me.
Vagrant is a VM provisioning tool, not a container runtime. Docker is the de-facto container standard for now, so yes, Docker specifically is definitely a thing to get familiar with.