fix frozen remote dev environment docker build vscode
# VSCode looks for devcontainer.json in .devcontainer in your project folder
# if the build is taking too long or locks, restarting vscode will do no good, or restarting your PC
# rename the devcontainer.json file to foo.bak or something, then exit vscode.
# upon reopening vscode, it will say Build Failed and you can then open locally as before.