add more comments

app.py

@@ -5,10 +5,10 @@ from bson.objectid import ObjectId
 from werkzeug.security import generate_password_hash, check_password_hash
 
 app = Flask(__name__)
-app.secret_key = 'secret_key'
+app.secret_key = 'secret_key' #change this to a random string
 
-#initialize the database
-client = MongoClient('localhost', 27017)
+#initialize the databases
+client = MongoClient('localhost', 27017) #change this if you are using a different host/port
 db = client.flask_db
 posts_collection = db.posts_collection
 users_collection = db.users_collection
@@ -41,7 +41,7 @@ def board(board_name):
     else:
         admin=False
     return render_template('board.html', title=board_name, header=display_name, links=links, posts=posts, admin=admin)
-
+#posting API
 @app.route('/post', methods=['POST'])
 def post():
     board_name = request.form['board_name']
@@ -70,7 +70,7 @@ def post():
     posts_collection.insert_one(post_data)
 
     return redirect(url_for('board', board_name=board_name))
-
+#image API
 @app.route('/image/<post_id>')
 def image(post_id):
     post = posts_collection.find_one({'_id': ObjectId(post_id)})
@@ -82,7 +82,7 @@ def image(post_id):
 @app.route('/login', methods=['GET'])
 def login():
     return render_template('login.html')
-
+#login API
 @app.route('/login', methods=['POST'])
 def login_post():
     username = request.form['username']
@@ -104,7 +104,7 @@ def login_post():
 def register():
     regalert = request.args.get('regalert', '')
     return render_template('register.html', regalert=regalert)
-
+#registration API
 @app.route('/register', methods=['POST'])
 def register_post():
     username = request.form['username']
@@ -123,7 +123,7 @@ def register_post():
         })
 
     return redirect(url_for('login'))
-
+#admin dashboard
 @app.route('/admin', methods=['GET'])
 def admin():
     admin_user = users_collection.find_one({'username': 'admin'})
@@ -138,7 +138,7 @@ def admin():
         return render_template('admin.html', success1=success1, success2=success2, success3=success3, total_users=total_users, total_posts=total_posts, nuke_count=nuke_count, users=users)
     else:
         return url_for('index')
-
+#admin functions
 @app.route('/deletepost', methods=['POST'])
 def deletepost():
     admin_user = users_collection.find_one({'username': 'admin'})
@@ -173,13 +173,13 @@ def nukeboard():
         nuke_counter.insert_one({'board_name': board_name}, {'date': datetime.now()})
         return redirect(url_for('admin', success3=success))
 
-
+#logout API
 @app.route('/logout')
 def logout():
     session.pop('user_id', None)
     session.pop('username', None)
     return redirect(url_for('index'))
 
-
+#start the server
 if __name__ == '__main__':
     app.run(debug=True, host='100.64.0.18', port=5000)