Docker

## Installing

$ docker version
$ docker run hello-world    // Runs the Hello World sample. Downloads from Dockerhub if it isn't available locally
$ docker ps -a              // Prints out all available containers on local machine
$ docker ps                 // Prints out all running containers on local machine

## Searching and runing
$ docker search whalesay | grep docker    // Searches docker hub and filters with grep
$ docker run docker/whalesay cowsay Hello
$ docker images           // Prints out list of all local images. Docker makes containers out of images

## Remove image
$ docker image rm -f a50e3329bb40   // Docker id, given by running docker images

## Create an image
1.  Create Dockerfile (must have that name), eg:
    FROM docker/whalesay:latest
    RUN apt-get -y update && apt-get install -y fortunes
    CMD /usr/games/fortune -a | cowsay
2. Build image
    $ docker build -t henrik-whalesay .
3. Run
    $ docker run henrik-whalesay
    
## Run web app
$ docker run -d -p 80:80 going-docker

One liner to stop / remove all of Docker containers:

$ docker stop $(docker ps -a -q)
$ docker rm $(docker ps -a -q)


## Docker on Zeit
1. Create Dockerfile. It must include the line EXPOSE 80 (or whatever port should be used).
2. Deploy by typing $ now

If the application uses any enviroment variables they are set like this:
$ now -e PASSWORD="fsdjfsf"