Editing Heroku (section)

==Example==
===Official Tutorial===
* from [https://devcenter.heroku.com/articles/getting-started-with-python official python tutorial]
 PS C:\Temp\python-getting-started> heroku login
* clone example
* create app and push code
* start the app
 PS C:\Temp\python-getting-started> heroku ps:scale web=1
 Scaling dynos... done, now running web at 1:Free
 PS C:\Temp\python-getting-started> heroku open
 // opens https://arcane-peak-78109.herokuapp.com/
* open the [https://dashboard.heroku.com/apps dashboard]
* stop it or scale it down to 0
 heroku ps:scale web=0
* prepare for running locally
 PS C:\Temp\python-getting-started> python -m venv venv
 PS C:\Temp\python-getting-started> .\venv\Scripts\activate
 (venv) PS C:\Temp\python-getting-started> pip install -r .\requirements.txt
* run it locally 
 (venv) PS C:\Temp\python-getting-started> python manage.py collectstatic
 (venv) PS C:\Temp\python-getting-started> heroku local -f .\Procfile.windows
* open it http://localhost:5000/

===Spring Boot Demo===
====Configuration for Heroku====
* steps from [https://devcenter.heroku.com/articles/deploying-spring-boot-apps-to-heroku offical Spring Boot tutorial]
* create demo1 application in <code>C:\Uwes\Programme\eclipse\workspace\demo1</code> and git it
* see SpringBoot.docx
* When deploying an app, Heroku reads <code>pom.xml</code> file and installs the dependencies by running <code>mvn clean install</code>. 
* check DB connection by
 C:\Uwes\Programme\PostgreSQL\12\bin> .\[[Postgres#Operation|psql]] -h ec2-3-230-122-20.compute-1.amazonaws.com -U cepxizounlueue defpfuas3qslld
* set specific configurations for Heroku by adding profile <code>heroku</code> to <code>pom.xml</code> and set config var <code>MAVEN_CUSTOM_OPTS</code> to <code>-P !local_dev,heroku</code>

====Run on Heroku====
 git push heroku master
 heroku open // opens the application https://intense-caverns-96515.herokuapp.com/ in a browser

====Prepare Locally Heroku====
* create Procfile <code>Procfile.windows</code> for running locally with command to start the Spring application <code>java -jar target/demo1-0.0.1-SNAPSHOT.jar</code>
* compile and build a JAR, with dependencies, placing it into your application’s target directory. The <code>spring-boot-maven-plugin</code> in the <code>pom.xml</code> provides this process
 mvn install
* create local DB
 C:\Uwes\Programme\xampp7.2.27\mysql\bin\mysql --user=root --password=mHalloo0@1m
   create database demo1;
* create <code>C:\Uwes\eclipse\workspace_2020-12\SpringBoot\demo1\set_local_dev.bat</code>
* add profile local_dev to <code>pom.xml</code>

====Run Heroku Locally====
* run the application
 set_local_dev.bat
 // start eclipse by start_eclipse.bat from shell and run it or
 heroku local -f Procfile.windows

====Run Eclipse Locally====
* see <code>src\main\resources\application.properties</code> which is not in Git repository
* start eclipse