feat: bundle devcontainer CLI in UDI

Adds @devcontainers/cli@0.88.0 to both ubi9 and ubi10 universal images,
eliminating the runtime npm install on every workspace start for
devcontainer setup.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Rohan Kumar <rohaan@redhat.com>

Author: rohanKanojia

universal/ubi10/Dockerfile

@@ -101,6 +101,11 @@ RUN source /home/user/.bashrc && \
     nvm alias default v${NODEJS_DEFAULT_VERSION} && nvm use v${NODEJS_DEFAULT_VERSION} && \
     npm install --global yarn@v1.22.22 &&\
     chgrp -R 0 /home/tooling && chmod -R g=u /home/tooling
+# devcontainer CLI — used by workspaces that build a devcontainer.json environment
+ENV DEVCONTAINER_CLI_VERSION=0.88.0
+RUN source /home/user/.bashrc && \
+    npm install --global @devcontainers/cli@${DEVCONTAINER_CLI_VERSION} && \
+    chgrp -R 0 /home/tooling && chmod -R g=u /home/tooling
 ENV PATH=$NVM_DIR/versions/node/v${NODEJS_DEFAULT_VERSION}/bin:$PATH
 ENV NODEJS_HOME_24=$NVM_DIR/versions/node/v${NODEJS_24_VERSION}
 ENV NODEJS_HOME_22=$NVM_DIR/versions/node/v${NODEJS_22_VERSION}

universal/ubi9/Dockerfile

@@ -99,6 +99,11 @@ RUN source /home/user/.bashrc && \
     nvm alias default v${NODEJS_DEFAULT_VERSION} && nvm use v${NODEJS_DEFAULT_VERSION} && \
     npm install --global yarn@v1.22.22 &&\
     chgrp -R 0 /home/tooling && chmod -R g=u /home/tooling
+# devcontainer CLI — used by workspaces that build a devcontainer.json environment
+ENV DEVCONTAINER_CLI_VERSION=0.88.0
+RUN source /home/user/.bashrc && \
+    npm install --global @devcontainers/cli@${DEVCONTAINER_CLI_VERSION} && \
+    chgrp -R 0 /home/tooling && chmod -R g=u /home/tooling
 ENV PATH=$NVM_DIR/versions/node/v${NODEJS_DEFAULT_VERSION}/bin:$PATH
 ENV NODEJS_HOME_22=$NVM_DIR/versions/node/v${NODEJS_22_VERSION}
 ENV NODEJS_HOME_20=$NVM_DIR/versions/node/v${NODEJS_20_VERSION}