Fix the build of the reproxyui.

The build was using the version of node and npm found in the user's /usr/bin directory instead of the hermetic version.
Also HOME was set to a non writable location.

Fixes #52

Change-Id: I83aefbe6b92bff01139611d00dcbc4cfc10fd478
Test: https://github.com/bentekkie/reclient/actions/runs/9618518748
Bug: N/A
GitOrigin-RevId: c653e8733eec94b9f9209c8bdebed12e3a747ad5

internal/pkg/logrecordserver/ui/BUILD.bazel

@@ -7,10 +7,20 @@ genrule(
         exclude = ["app/dist/**/*"],
     ),
     outs = ["reproxytool_ui.tar"],
-    cmd_bash = "export PATH=$$PATH:$$PWD/$$(dirname $(NPM_PATH)) && export ROOT=$$PWD ;" +
-               "echo \"Installing angular...\" ; cd internal/pkg/logrecordserver/ui/app ; $$ROOT/$(NPM_PATH) ci ;" +
-               "echo \"Building app\" ; node_modules/.bin/ng build ;" +
-               "cd $$ROOT ; tar cvf $(OUTS) internal/pkg/logrecordserver/ui/app/dist/reproxyui/browser",
+    cmd_bash = """
+      export PATH=$$PWD/$$(dirname $(NPM_PATH)):$$PWD/$$(dirname $(NODE_PATH)):$$PATH
+      export ROOT=$$PWD
+      export HOME=/tmp
+
+      echo "Installing angular..."
+      cd internal/pkg/logrecordserver/ui/app
+      $$ROOT/$(NPM_PATH) ci
+
+      echo "Building app"
+      node_modules/.bin/ng build
+      cd $$ROOT
+      tar cvf $(OUTS) internal/pkg/logrecordserver/ui/app/dist/reproxyui/browser
+    """,
     exec_properties = {"dockerNetwork": "standard"},
     target_compatible_with = select({
         "@platforms//os:linux": [],