Create app.py

app.py

@@ -0,0 +1,13 @@
+from fastapi import FastAPI
+import os
+
+app = FastAPI()
+
+
+@app.get("/")
+async def root():
+    return {
+        "status": "ok",
+        "service": "practical_astronomy",
+        "transport": os.environ.get("MCP_TRANSPORT", "stdio"),
+    }