Add gitpod config

this commit adds support for Gitpod.io, a free automated
dev environment that makes contributing and generally working on GitHub
projects much easier. It allows anyone to start a ready-to-code dev
environment for any branch, issue and pull request with a single click.

.gitpod.Dockerfile

@@ -0,0 +1,10 @@
+FROM gitpod/workspace-full
+                    
+USER gitpod
+
+# Install custom tools, runtime, etc. using apt-get
+# For example, the command below would install "bastet" - a command line tetris clone:
+#
+# RUN sudo apt-get -q update && #     sudo apt-get install -yq bastet && #     sudo rm -rf /var/lib/apt/lists/*
+#
+# More information: https://www.gitpod.io/docs/config-docker/

.gitpod.yml

@@ -0,0 +1,4 @@
+tasks:
+  - init: pip install -r ./requirements.txt
+image:
+  file: .gitpod.Dockerfile

README.md

@@ -42,6 +42,9 @@ Details and discussion are on the "Experimental" section of the forum: https://w
 
 Automated builds of the (new) documentation can be found at [ESPEasy.readthedocs.io](https://espeasy.readthedocs.io/en/latest/)
 
+[![Gitpod Ready-to-Code](https://img.shields.io/badge/Gitpod-Ready--to--Code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/letscontrolit/ESPEasy) 
+
+
 ## Icons used
 
 Icons on courtesy of [ICONS8](https://icons8.com/).