Update cache mode in build workflow and simplify Dockerfile build steps

Author: aristarkhovNV

.github/workflows/build-ubuntu.yml

@@ -179,7 +179,7 @@ jobs:
         load: true
         push: false
         cache-from: type=gha,scope=teleop-ros2-${{ matrix.ros_distro }}
-        cache-to: type=gha,mode=max,scope=teleop-ros2-${{ matrix.ros_distro }}
+        cache-to: type=gha,mode=min,scope=teleop-ros2-${{ matrix.ros_distro }}
 
     - name: Smoke test (ROS 2 + rclpy)
       run: |

examples/teleop_ros2/Dockerfile

@@ -83,8 +83,7 @@ RUN --mount=type=cache,target=/opt/isaacteleop/build,id=isaacteleop-teleop-ros2-
         -DENABLE_CLANG_FORMAT_CHECK=OFF \
         -DISAAC_TELEOP_PYTHON_VERSION=${PYTHON_VERSION} \
     && cmake --build build --config Release -j$(nproc) \
-    && cmake --install build --config Release \
-    && rm -rf build
+    && cmake --install build --config Release
 
 COPY --chmod=644 <<EOF /usr/local/bin/teleop-env-setup
 source /opt/ros/${ROS_DISTRO}/setup.bash