feat(server): Add API prefix `/api` to prevent route collisions with frontend (#7472)

- Add prefix `/api` to `APIRouter` in server.py
- Update API client in Builder
   - Update default `AGPT_SERVER_URL` in .env.template
   - Update default `baseUrl` in `AutoGPTServerAPI` constructor

rnd/autogpt_builder/.env.example

@@ -1 +1 @@
-AGPT_SERVER_URL=http://localhost:8000
+AGPT_SERVER_URL=http://localhost:8000/api

rnd/autogpt_builder/src/lib/autogpt_server_api.ts

@@ -7,7 +7,9 @@ export default class AutoGPTServerAPI {
   private socket: WebSocket | null = null;
   private messageHandlers: { [key: string]: (data: any) => void } = {};
 
-  constructor(baseUrl: string = process.env.AGPT_SERVER_URL || "http://localhost:8000") {
+  constructor(
+    baseUrl: string = process.env.AGPT_SERVER_URL || "http://localhost:8000/api"
+  ) {
     this.baseUrl = baseUrl;
     this.wsUrl = `ws://${new URL(this.baseUrl).host}/ws`;
   }

rnd/autogpt_server/autogpt_server/server/server.py

@@ -70,7 +70,7 @@ class AgentServer(AppService):
         )
 
         # Define the API routes
-        router = APIRouter()
+        router = APIRouter(prefix="/api")
         router.add_api_route(
             path="/blocks",
             endpoint=self.get_graph_blocks,  # type: ignore