API: Add standalone method to fetch OpenAPI docs

Generates and stores an export of the openapi.json file for use in
static websites.

Signed-off-by: kingbri <bdashore3@proton.me>

.gitignore

@@ -199,3 +199,6 @@ sampler_overrides/*
 
 # Gpu lib preferences file
 gpu_lib.txt
+
+# OpenAPI JSON
+openapi.json

endpoints/server.py

@@ -25,6 +25,10 @@ app.add_middleware(
 )
 
 
+def setup_app():
+    app.include_router(OAIRouter)
+
+
 async def start_api(host: str, port: int):
     """Isolated function to start the API server"""
 
@@ -33,8 +37,8 @@ async def start_api(host: str, port: int):
     logger.info(f"Completions: http://{host}:{port}/v1/completions")
     logger.info(f"Chat completions: http://{host}:{port}/v1/chat/completions")
 
-    # Add OAI router
-    app.include_router(OAIRouter)
+    # Setup app
+    setup_app()
 
     config = uvicorn.Config(
         app,

generate_openapi.py

@@ -0,0 +1,13 @@
+import json
+from endpoints import server
+
+
+if __name__ == "__main__":
+    """Uses the FastAPI server to write an OpenAPI JSON documentation file."""
+
+    server.setup_app()
+    openapi_json = json.dumps(server.app.openapi())
+
+    # Write JSON to a file
+    with open("openapi.json", "w") as f:
+        f.write(openapi_json)