Added Dockerfile to build robot controoler container

Dockerfile

@@ -0,0 +1,48 @@
+# syntax=docker/dockerfile:1
+
+# ── Stage 1: build ────────────────────────────────────────────────────────────
+FROM ros:kilted AS builder
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    python3-colcon-common-extensions \
+    python3-pip \
+    ros-${ROS_DISTRO}-ament-cmake-python \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /ws
+
+# Install the vendored Raspbot hardware library
+COPY raspbot_v2_interface/ raspbot_v2_interface/
+# PEP 668: newer Debian/Ubuntu marks the system Python as externally managed and blocks pip
+# by default. --break-system-packages overrides this; safe here as the container is isolated.
+RUN pip3 install --no-cache-dir --break-system-packages ./raspbot_v2_interface
+
+# Copy the ROS package into the standard colcon src/ layout and build it
+COPY package.xml setup.py setup.cfg CMakeLists.txt src/my_robot/
+COPY my_robot/ src/my_robot/my_robot/
+
+RUN . /opt/ros/${ROS_DISTRO}/setup.sh && \
+    colcon build --packages-select my_robot
+
+# ── Stage 2: runtime ──────────────────────────────────────────────────────────
+FROM ros:kilted-ros-core
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ros-${ROS_DISTRO}-rclpy \
+    ros-${ROS_DISTRO}-geometry-msgs \
+    ros-${ROS_DISTRO}-std-msgs \
+    && rm -rf /var/lib/apt/lists/*
+
+# Bring across the installed Raspbot library and the built ROS overlay
+COPY --from=builder /usr/local/lib /usr/local/lib
+COPY --from=builder /ws/install /ws/install
+
+# Source both ROS base and the workspace overlay on every shell/exec
+RUN echo "source /opt/ros/${ROS_DISTRO}/setup.bash" >> /etc/bash.bashrc && \
+    echo "source /ws/install/setup.bash"             >> /etc/bash.bashrc
+
+COPY docker-entrypoint.sh /docker-entrypoint.sh
+RUN chmod +x /docker-entrypoint.sh
+
+ENTRYPOINT ["/docker-entrypoint.sh"]
+CMD ["ros2", "run", "my_robot", "motor_controller"]