added misc. documentation

app.py

@@ -10,7 +10,11 @@ class Model(BaseModel):
     param_count: Optional[int] = None
 
 
-app = FastAPI()
+app = FastAPI(
+    title="ML Repository API", 
+    description="API for getting predictions from hosted ML models.", 
+    version="0.0.1")
+
 
 models = [Model(id=0, name="CNN"), Model(id=1, name="Transformer")]
 id_2_hosted_models = {
@@ -25,18 +29,24 @@ model_names_2_id = {
 def greet_json():
     return {"Hello World": "Welcome to my ML Repository API!"}
 
+@app.get("/hosted")
+def list_models():
+    "List all the hosted models."
+    return models
+
 @app.get("/hosted/id/{model_id}")
 def get_by_id(model_id: int):
-
+    "Get a specific model by its ID."
     if model_id not in id_2_hosted_models:
         raise HTTPException(status_code=404, detail=f"Model with id={model_id} not found")
-    
+
     return id_2_hosted_models[model_id]
 
 @app.get("/hosted/name/{model_name}")
 def get_by_name(model_name: str):
+    "Get a specific model by its name."
+
     model_name = model_name.lower()
-    
     if model_name not in model_names_2_id:
         raise HTTPException(status_code=404, detail=f"Model '{model_name}' not found")