[YUNIKORN-2799] Fix Dockerfile warnings (#910)

Closes: #910

Signed-off-by: Craig Condit <[email protected]>

docker/admission/Dockerfile

@@ -14,7 +14,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-FROM --platform=$TARGETPLATFORM scratch
+FROM scratch
 COPY --chown=0:0 LICENSE NOTICE third-party-licenses.md yunikorn-admission-controller /
 USER 4444:4444
 ENTRYPOINT [ "/yunikorn-admission-controller" ]

docker/plugin/Dockerfile

@@ -14,7 +14,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-FROM --platform=$TARGETPLATFORM scratch
+FROM scratch
 COPY --chown=0:0 LICENSE NOTICE third-party-licenses.md yunikorn-scheduler-plugin scheduler-config.yaml /
 USER 4444:4444
 ENTRYPOINT [ "/yunikorn-scheduler-plugin", "--bind-address=0.0.0.0", "--config=/scheduler-config.yaml" ]

docker/scheduler/Dockerfile

@@ -14,7 +14,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-FROM --platform=$TARGETPLATFORM scratch
+FROM scratch
 COPY --chown=0:0 LICENSE NOTICE third-party-licenses.md yunikorn-scheduler /
 USER 4444:4444
 ENTRYPOINT [ "/yunikorn-scheduler" ]

docker/webtest/Dockerfile

@@ -16,7 +16,7 @@
 # limitations under the License.
 
 # Imagestage: use scratch base image
-FROM --platform=$TARGETPLATFORM scratch
+FROM scratch
 COPY --chown=0:0 document/index.html /html/
 COPY --chown=0:0 LICENSE NOTICE third-party-licenses.md web-test-server /
 EXPOSE 9889