Chore: Add npm build hooks (#649)

pyproject.toml

@@ -91,3 +91,6 @@ exclude = [
 
 [tool.hatch.build.hooks.vcs]
 version-file = "src/pytest_html/__version.py"
+
+[tool.hatch.build.hooks.custom]
+path = "scripts/npm.py"

scripts/npm.py

@@ -0,0 +1,9 @@
+import subprocess
+
+from hatchling.builders.hooks.plugin.interface import BuildHookInterface
+
+
+class NpmBuildHook(BuildHookInterface):
+    def initialize(self, version, build_data):
+        subprocess.check_output("npm install", shell=True)
+        subprocess.check_output("npm run build", shell=True)