A workflow for configuring and deploying PHP apps via dokku

PHP Dokku workflow

# Make PHP app Dokku-friendly
  # Add staging and production clauses to database.yml
  # Tell docker how to start app, Add to Procfile (web server dependant)
    # Simple puma setup
    Make Procfile, add line:
      web: bundle exec puma -t ${PUMA_MIN_THREADS:-1}:${PUMA_MAX_THREADS:-1} -w ${PUMA_WORKERS:-2} -p $PORT -e ${RACK_ENV:-production}
    # Simple unicorn setup:
      Make Procfile, add line:
        web: bundle exec unicorn -p $PORT -c ./config/unicorn.rb
    Make config/unicorn.rb, populate with default pre and post-fork blocks

# In a git repo folder, add a dokku remote following `git remote add <remote_name> <role>@<ip_or_domain>:<codename>`, for example:
  git remote add dokku dokku@apps.creative.gs:wordpress
  # deploy to dokku remote
  git push dokku master
  # Dokku only deploys master, so in case of other branch deploy do `git push <remote> <other_branch>:master`:
    git push dokku staging:master
    
# Link database container to app container


# ENV config
  # use command `dokku config:set <app-name> <key>=<value>`
  dokku config:set <app-name> RAILS_ENV=staging
  dokku config:set <app-name> SECRET_KEY_BASE=as6dka987da...
  
# To redeploy without changes
 dokku release <appname>
 dokku deploy <appname>
 
# To add additional SSH keys, run on the computer that wants to add:
  cat ~/.ssh/id_rsa.pub | ssh deployer@<IP> "sudo sshcommand acl-add dokku progrium"

# To remove a container
  # SSH onto the server, then execute:
  dokku delete myapp