Sample Docker development commands

sample-docker-dev-commands

# Example is for a Python Flask app
# Assumes your project is structured as:
/project/Dockerfile
/project/app/... #Source code that you can edit

# Dockerfile snippet -----------------------------
# Add /app as /webroot/app in the container
ADD ./app /webroot/app

# Commands to use Docker  -----------------------------
# CD to dir
cd /project

# Create a docker base image called dev-image using the Dockerfile in /project
docker build -t=dev-image .

#  Create a docker container called dev-container that is open on port 8001
#  Mount local files as /webroot/app in the container. This overrides the ADD command in the Dockefile
#  Use dev-image as the image for the container.
docker create --name=dev-container -t -i -p 0.0.0.0:8001:8001 -v /home/some-user/webroot/app:/webroot/app dev-image /bin/bash

# Start dev-container and attach to it
docker start -a -i dev-container

# Once the container starts, you are free to start up your server/edit the source code in /project/app etc. 
# In this case I'm using Python/gunicorn.
# The app should be visible on localhost:8001 or server-name:8001
gunicorn --reload -w 4 -b 0.0.0.0:8001 app:app