Understand volumes

Author: Bi0max

README.md

@@ -1,4 +1,6 @@
-Based on tutorial from https://medium.com/@angellom/automatically-building-a-flask-docker-image-on-git-push-with-jenkins-5a30c9fc9beb
-Also based on https://blog.jetbrains.com/pycharm/2017/03/docker-compose-getting-flask-up-and-running/
+Based on tutorial from https://medium.com/@angellom/automatically-building-a-flask-docker-image-on-git-push-with-jenkins-5a30c9fc9beb  
+Also based on https://blog.jetbrains.com/pycharm/2017/03/docker-compose-getting-flask-up-and-running/  
+Understanding volumes: https://container-solutions.com/understanding-volumes-docker/  
+
 
 Change #1

app.py

@@ -5,7 +5,12 @@
 
 @app.route('/')
 def hello_world():
-    s = 'Flask Dockerized #1 \n' + str(sys.version)
+    s = "Flask Dockerized Update through volume #1 \n" + str(sys.version)
+    s += "\n"
+    with open("test.txt", "r") as f:
+        for line in f:
+            s += line
+    
     return s
 
 

docker-compose.override.yml

@@ -2,4 +2,4 @@ version: '3.2'
 services:
   web:
     volumes:
-      - .:/flask-app
+      - .:/flask-app:ro

test.txt

@@ -0,0 +1 @@
+Original text