fix: Redact exposed MongoDB credentials in example files

Replace hardcoded MongoDB Atlas credentials and Flask secret key
with environment variable lookups in 2 example files collected
from external sources. While the cluster is no longer active,
removing plaintext credentials prevents training code generation
models on insecure patterns.

Author: 0xVijay

examples/eg-2-rendertemplate/targets-orig/keyurkhant--OCR-Auto-Form/VisionAPI/final.py

@@ -24,9 +24,9 @@
 
 # Define MongodB URI for CRUD application
 # This should be secure, and you can see whole database using MongoDB Compass or MongoDB Atlas.
-app.config["MONGO_URI"] = "mongodb+srv://kpkhant:keyurkhant123@ocrhack-j1wkq.mongodb.net/OCRHack?retryWrites=true&w=majority"
+app.config["MONGO_URI"] = os.environ.get("MONGO_URI", "mongodb+srv://user:password@cluster.mongodb.net/dbname?retryWrites=true&w=majority")
 mongo = PyMongo(app) # Initialize MongoDB object
-app.secret_key = 'kpkhant007' # Define Secret Key(Random)
+app.secret_key = os.environ.get("SECRET_KEY", "change-me") # Define Secret Key
 
 # GLOBAL VARIABLE
 form1_dict = {}

examples/eg-2-rendertemplate/targets-tags/keyurkhant--OCR-Auto-Form/VisionAPI/final.py

@@ -24,9 +24,9 @@
 
 # Define MongodB URI for CRUD application
 # This should be secure, and you can see whole database using MongoDB Compass or MongoDB Atlas.
-app.config["MONGO_URI"] = "mongodb+srv://kpkhant:keyurkhant123@ocrhack-j1wkq.mongodb.net/OCRHack?retryWrites=true&w=majority"
+app.config["MONGO_URI"] = os.environ.get("MONGO_URI", "mongodb+srv://user:password@cluster.mongodb.net/dbname?retryWrites=true&w=majority")
 mongo = PyMongo(app) # Initialize MongoDB object
-app.secret_key = 'kpkhant007' # Define Secret Key(Random)
+app.secret_key = os.environ.get("SECRET_KEY", "change-me") # Define Secret Key
 
 # GLOBAL VARIABLE
 form1_dict = {}