update database.py and main.py

backend/main.py

@@ -1,6 +1,32 @@
 # Python backend for a calender for my friend group.
 # We had the problem of never agreeing when or where
-# we should meet up, and I hope this fixes the problem.
+# we should meet up, and I hope this fixes the problem. 
+
+from fastapi import FastAPI
+from database import fetch_all
+
+app = FastAPI(
+    title="Calendar API",
+    description="Room based agenda system",
+    version="0.1"
+)
+
+
+@app.get("/")
+def home():
+    return {
+        "status": "online",
+        "service": "Calendar API"
+    }
+
+
+@app.get("/database")
+def database_status():
+    tables = fetch_all(
+        "SELECT name FROM sqlite_master WHERE type='table';"
+    )
+
+    return {
+        "tables": [table["name"] for table in tables]
+    }
 
-import fastapi
-import time