diff --git a/README.md b/README.md
index 13dc308..e61d9a8 100644
--- a/README.md
+++ b/README.md
@@ -106,7 +106,11 @@ cd docker
 sudo docker-compose -p copanier up
 ```
 
-The app will be available at http://localhost:2244
+The app will be available at http://localhost:2244.
+
+Database is saved under `db` folder. This folder is mounted in `app` container to persist data changes on host disk.
+
+For development purpose, you can use both `docker-compose.yml` and `docker-compose-dev.yml` which allows you to work on copanier source code and make gunicorn automatically reload workers when code changes.
 
 ## Run local server
 
diff --git a/copanier/emails.py b/copanier/emails.py
index 44d38bd..73f3091 100644
--- a/copanier/emails.py
+++ b/copanier/emails.py
@@ -16,7 +16,7 @@ def send(to, subject, body, html=None, copy=None, attachments=None):
 
     if not config.SEND_EMAILS:
         body = body.replace("https", "http")
-        return print("Sending email", str(body.encode('utf-8')))
+        return print("Sending email", str(body.encode('utf-8')), flush=True)
 
     message.send(
         to=to,
diff --git a/docker/docker-compose-dev.yml b/docker/docker-compose-dev.yml
new file mode 100644
index 0000000..ae4eae3
--- /dev/null
+++ b/docker/docker-compose-dev.yml
@@ -0,0 +1,6 @@
+version: "3.9"
+services:
+  app:
+    command: /srv/copanier-venv/bin/gunicorn -k roll.worker.Worker copanier:app --bind 0.0.0.0:2244 --reload --log-level debug --access-logfile - --error-logfile -
+    volumes:
+      - "../:/srv/copanier/"
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index ddd0f8e..628e5dd 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -5,12 +5,16 @@ services:
       context: ..
       dockerfile: "./docker/Dockerfile"
     command: /srv/copanier-venv/bin/gunicorn -k roll.worker.Worker copanier:app --bind 0.0.0.0:2244
+    volumes:
+      - "../copanier/db:/srv/copanier/db" # To persist database changes
+    restart: always
   static:
     image: "nginx:latest"
     volumes:
       - "../copanier/static:/srv/copanier_static/static:ro"
       - "./nginx-default.conf:/etc/nginx/conf.d/default.conf:ro"
+    restart: always
     depends_on:
       - app
     ports:
-      - 0.0.0.0:2244:80
\ No newline at end of file
+      - 0.0.0.0:2244:80