Update Dockerfile

Signed-off-by: ThatMG393 <73651803+ThatMG393@users.noreply.github.com>

Author: ThatMG393

Dockerfile

@@ -6,4 +6,8 @@ RUN sudo apt-get update \
  && sudo apt-get clean \
  && sudo rm -rf /var/cache/apt/* \
  && sudo rm -rf /var/lib/apt/lists/* \
- && sudo rm -rf /tmp/*
+ && sudo rm -rf /tmp/* \
+ && curl -sSL https://dot.net/v1/dotnet-install.sh | sudo bash /dev/stdin --channel LTS --runtime dotnet --os linux --version 7.x.x \
+ && export DOTNET_ROOT=$HOME/.dotnet \
+ && export PATH=$PATH:$DOTNET_ROOT:$DOTNET_ROOT/tools \
+ && source ~/.bashrc