Step 1. create Flask app on https://github.com/zhuby1973/code.git
Step 2. create an application From Git on OpenShift console
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Step 3. input repository link, Context Dir and select python
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Step 4. update service port from 8080 to 5000 once build
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Step 5. verify the Flask application after restart
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Step 6. you can edit the code in Git, then redeploy to get the application been updated!