Добавил мини приложение на фласке, обновил зависимости, открыл порты на композе

SpreadsheetsService/app.py

@@ -1,6 +1,12 @@
-import pathlib
-import os
+from flask import Flask
 
-f = open("/app/file.txt", "a")
-f.write("We wrote some text")
-f.close()
+app = Flask(__name__)
+
+
+@app.route("/")
+def hello_world():
+    return "Hello world!\n"
+
+
+if __name__ == "__main__":
+    app.run(debug=True, host="0.0.0.0")

SpreadsheetsService/file.txt

@@ -1 +0,0 @@
-We wrote some textWe wrote some text

SpreadsheetsService/requirements.txt

@@ -0,0 +1 @@
+Flask==2.0.0

docker-compose.yml

@@ -4,6 +4,8 @@ services:
     spreadsheets:
         container_name: "carolyn-spreadsheets"
         build: ./SpreadsheetsService
+        ports: 
+            - "5000:5000"
         environment: 
             SECRETKEY: "HELLO-WORLD-@21XX 15AF"
         volumes: