Deploy to heroku button (#459)

* Add "Deploy to Heroku" button to README.md

* Make "Deploy to Heroku" button open a new browser tab

* Fixing markdown typo in Deploy to Heroku button

* Revert changes for opening Heroku in a new tab

apparently Github doesn't support it

* Add Instructions for Deploy to Heroku button

* Add deploy button to instruction page

* Removed button on the instruction page because it only works at the project root

* Fixed some markdown lint errors

* Fixed more MD lint issues

* Added Procfile.txt

* Removed .txt file extension from Procfile

* Add TABPY_PORT env var and copy $PORT value to it after deploy

* Removed static config for Port env var from app.json

The port is dynamic and needs to be set on deploy via

* Moved dynamic Port env var assignment to Procfile

* Added a bit more detail to the instructions

* Removed an extra empty line in app.json

Co-authored-by: Jim Liu <[email protected]>

Procfile

@@ -0,0 +1 @@
+web: export TABPY_PORT=$PORT && tabpy

README.md

@@ -11,6 +11,8 @@
 ![PyPI - Python Version](https://img.shields.io/pypi/pyversions/tabpy?label=PyPI%20Python%20versions)
 [![PyPI version](https://badge.fury.io/py/tabpy.svg)](https://pypi.python.org/pypi/tabpy/)
 
+[![Deploy](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy)
+
 TabPy (the Tableau Python Server) is an Analytics Extension implementation which
 expands Tableau's capabilities by allowing users to execute Python scripts and
 saved functions via Tableau's table calculations.
@@ -21,6 +23,7 @@ Consider reading TabPy documentation in the following order:
 * [TabPy Installation Instructions](docs/server-install.md)
 * [TabPy Server Configuration Instructions](docs/server-config.md)
 * [Running TabPy in Virtual Environment](docs/tabpy-virtualenv.md)
+* [Running TabPy on Heroku](docs/deploy-to-heroku.md)
 * [Authoring Python calculations in Tableau](docs/TableauConfiguration.md).
 * [TabPy Tools](docs/tabpy-tools.md)
 

app.json

@@ -0,0 +1,7 @@
+{
+    "name": "TabPy",
+    "description": "Analytics Extension implementation which expands Tableau's capabilities by allowing users to execute Python scripts and saved functions via Tableau's table calculations.",
+    "repository": "https://github.com/tableau/TabPy",
+    "logo": "",
+    "keywords": ["tableau", "python", "analytics-extension"]
+}

docs/deploy-to-heroku.md

@@ -0,0 +1,11 @@
+# Deploying TabPy to your Heroku account
+
+To deploy TabPy from master branch to a Heroku account:
+
+1. Log in to Heroku with your account via a browser.
+    If you don't have an account, create one.
+
+2. Click the "Deploy to Heroku" button in the Readme.
+
+3. Configure the new TabPy server by setting environment
+    variables through Heroku's web console or API.