Added Dev Environment as code

.gitpod.yml

@@ -0,0 +1,12 @@
+tasks:
+  - before: |
+      export FLASK_APP=microblog.py
+    init: |
+      pip install setuptools==45 # see https://github.com/pypa/setuptools/issues/2017#issuecomment-605354361
+      pip install -r ./requirements.txt
+      flask db upgrade
+    command: |
+      flask run
+ports:
+  - port: 5000
+    onOpen: open-preview

.theia/settings.json

@@ -0,0 +1,3 @@
+{
+    "python.pythonPath": "/home/gitpod/.pyenv/shims/python"
+}

README.md

@@ -1,3 +1,3 @@
-# Welcome to Microblog!
+# Welcome to Microblog! [![Gitpod ready-to-code](https://img.shields.io/badge/Gitpod-ready--to--code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/miguelgrinberg/microblog)
 
 This is an example application featured in my [Flask Mega-Tutorial](https://blog.miguelgrinberg.com/post/the-flask-mega-tutorial-part-i-hello-world). See the tutorial for instructions on how to work with it.