* [#260] One click deploy to heroku
* Added app.json file for Heroku deployment
* Made changes in Procfile to accept the PORT as env variable
* Added the one click button in README.md
* Change readme and link
* Alignment of button in Readme
* Changing redis to free plan
* Removed node-js build-pack
* Changed the post-deploy script to be rake db:migrate
* Removed web concurrency variable from app.json for heroku
* Changed the link to chatwoot logo referenced in app.json
* Changed postdeploy hook
* Changed logo to be raw content from github
* Changed the SMTP variables
* Added optional conditional for sending mail
* Changed the naming of SMTP variables
* Having logo as base 64 encoded image for heroku deploy page
* Fixed key not found error for SMTP variables
* Correcting the specs for conversation assignment mailer
* Spec rubocop fixes
* Spec rubocop fixes
* Added the link to master for heroku app.json
* Added dotenv-rails gem to manage environment variables
* Added dotenv-rails gem to manage environment variables
* Removed figaro which was used earlier for this purpose
* Standardized variable names
* Changed all env variables to be upper case. This included changes in files referencing env variables.
* Added example env file with all variables set to empty value
* Removed the earlier setup of copying application.yml and database.yml and the scripts and documentation associated to this
* Docker setup
* Added docker file for building the docker images
* Added entrypoint.sh script which is referenced inside the Docker image
* Cloned the Procfile for development using docker which has slight change compared to regular procfile
* Added the docker-compose.yml which has 3 service's configuration, postgres, redis and chatwoot server and a mounted volume for postgres
* Added docker related info to documentation
* Added the docker setup info in the documentation
* Added info for using`rbenv` instead of rvm for managing ruby versions
* Updated the documentation for environment variables to have one about `dotenv-rails` gem and removed the documentation about the old copy paste method used by figaro
* Changing the postgres database, username and password as environment variables
* Removed database.yml from gitignore
* Made the postgres databse, username and password as environemnt variables
* Added this in documentation
* Added a quick setup page
* Added quick setup page
* Removed the docs from README and added link to the docs in website
* Removed the figaro related things from circle.ci config
* Adding external volume for redis in docker compose
* Added instructions for adding the redis volume in docs
