feat(collab): init service

Author: kokerinks

.gitignore

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+**/__pycache__/

README.md

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 # CS3219 Project (PeerPrep) - AY2526S1
-## Group: Gxx
+## Group: G37
 
 ### Note: 
 - You are required to develop individual microservices within separate folders within this repository.

services/collaboration-service/main.py

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+from fastapi import FastAPI
+
+app = FastAPI()
+
+@app.get("/hello")
+def hello():
+    return {"message": "Hello World"}