[tool] Add the codespace container of rt-thread

.devcontainer/Dockerfile

@@ -0,0 +1,46 @@
+FROM ubuntu:20.04
+
+ARG DEST_DIR=/root
+
+WORKDIR ${DEST_DIR}
+
+#system
+RUN apt-get update
+
+RUN apt-get upgrade -y
+
+RUN apt-get install -y vim git wget python3 python-is-python3 pip gcc-arm-none-eabi scons libncurses5-dev
+
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y qemu-system-arm
+
+#env
+RUN mkdir /root/.env
+
+RUN mkdir /root/.env/tools
+
+RUN mkdir /root/.env/packages
+
+RUN mkdir /root/.env/packages/packages
+
+RUN mkdir /root/.env/tools/scripts
+
+RUN touch /root/.env/packages/Kconfig
+
+RUN echo 'source "$PKGS_DIR/packages/Kconfig"' > /root/.env/packages/Kconfig
+
+RUN git clone https://github.com/RT-Thread/env.git /root/.env/tools/scripts/
+
+RUN git clone https://github.com/RT-Thread/packages.git /root/.env/packages/packages/
+
+ENV PATH="/root/.env/tools/scripts:$PATH"
+
+RUN pip install requests -qq
+
+ENV RTT_EXEC_PATH=/usr/bin
+
+ENV RTT_CC=gcc
+
+WORKDIR /root
+
+
+