Add Artist schema

schemas/artist.py

@@ -0,0 +1,18 @@
+from pydantic import BaseModel, Field
+
+class ArtistBase(BaseModel):
+    name: str = Field(..., min_length=1, index=True, unique=True, description="Artist's name")
+    country: str = Field("Norway", description="Artist's country of origin")
+
+class ArtistCreate(ArtistBase):
+    pass
+
+class ArtistResponse(ArtistBase):
+    class Config:
+        orm_mode = True
+        schema_extra = {
+            "example": {
+                "name": "Edvard Munch",
+                "country": "Norway"
+            }
+        }