Ignore node_modules in any subdirectory for Docker (#1857)
Ignore node_modules in any subdirectory for Docker (#1857)

- Make `node_modules` in `.dockerignore` recursive to not add any `node_modules` folders into the build context
CTFd/CTFd,isislab/CTFd,isislab/CTFd,isislab/CTFd,ajvpot/CTFd,ajvpot/CTFd,isislab/CTFd,ajvpot/CTFd,CTFd/CTFd,CTFd/CTFd,CTFd/CTFd,ajvpot/CTFd