refactor: rewrote js loader to uniform with the others

dyana/loaders/js/Dockerfile

@@ -1,10 +1,13 @@
-FROM node:23-slim
+FROM python:3.12-slim
+
+RUN apt-get update && apt-get install -y nodejs npm
 
 WORKDIR /app
 
-COPY main.js .
+COPY dyana.py .
+COPY main.py .
 
 ARG EXTRA_REQUIREMENTS
 RUN if [ -n "$EXTRA_REQUIREMENTS" ]; then npm install $EXTRA_REQUIREMENTS; fi
 
-ENTRYPOINT ["node", "main.js"]
+ENTRYPOINT ["python3", "-W", "ignore", "main.py"]

dyana/loaders/js/main.py

@@ -0,0 +1,27 @@
+import argparse
+import json
+import os
+import subprocess
+
+from dyana import Profiler  # type: ignore[attr-defined]
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Run an Javascript file")
+    parser.add_argument("--script", help="Path to Javascript file", required=True)
+    args = parser.parse_args()
+    profiler: Profiler = Profiler()
+
+    if not os.path.exists(args.script):
+        profiler.track_error("js", "Javascript file not found")
+    else:
+        try:
+            result = subprocess.run(["node", args.script], capture_output=True, text=True)
+
+            profiler.track_memory("after_execution")
+            profiler.track("exit_code", result.returncode)
+            profiler.track("stdout", result.stdout)
+            profiler.track("stderr", result.stderr)
+        except Exception as e:
+            profiler.track_error("js", str(e))
+
+    print(json.dumps(profiler.as_dict()))