Allow building the images with Buildah in Kubernetes Plugin sidecar

dockerfiles/remote-plugin-kubernetes-tooling-1.0.4/Dockerfile

@@ -15,6 +15,8 @@ ENV KUBECTL_VERSION v1.16.1
 ENV HELM_VERSION v2.14.3
 ENV HOME=/home/theia
 
+ADD etc/storage.conf $HOME/.config/containers/storage.conf
+
 RUN curl https://storage.googleapis.com/kubernetes-release/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl -o /usr/local/bin/kubectl && \
     chmod +x /usr/local/bin/kubectl && \
     curl -o- -L https://storage.googleapis.com/kubernetes-helm/helm-${HELM_VERSION}-linux-amd64.tar.gz | tar xvz -C /usr/local/bin --strip 1 && \

dockerfiles/remote-plugin-kubernetes-tooling-1.0.4/etc/storage.conf

@@ -0,0 +1,30 @@
+[storage]
+  driver = "overlay"
+  runroot = "/var/tmp/theia"
+  graphroot = "/home/theia/.local/share/containers/storage"
+  [storage.options]
+    size = ""
+    remap-uids = ""
+    remap-gids = ""
+    ignore_chown_errors = "true"
+    remap-user = ""
+    remap-group = ""
+    ostree_repo = ""
+    skip_mount_home = ""
+    mount_program = "/usr/bin/fuse-overlayfs"
+    mountopt = ""
+    [storage.options.thinpool]
+      autoextend_percent = ""
+      autoextend_threshold = ""
+      basesize = ""
+      blocksize = ""
+      directlvm_device = ""
+      directlvm_device_force = ""
+      fs = ""
+      log_level = ""
+      min_free_space = ""
+      mkfsarg = ""
+      mountopt = ""
+      use_deferred_deletion = ""
+      use_deferred_removal = ""
+      xfs_nospace_max_retries = ""