Fully automate dev setup with Gitpod (selfhostedshow#91)

* Fully automate dev setup with Gitpod

This commit implements a fully-automated development setup using Gitpod.io, an
online IDE for GitLab, GitHub, and Bitbucket that enables Dev-Environments-As-Code.
This makes it easy for anyone to get a ready-to-code workspace for any branch,
issue or pull request almost instantly with a single click.

* Updated gitpod config

* added startup command

.gitpod.yml

@@ -0,0 +1,26 @@
+image:
+  file: ./gitpod/.gitpod.Dockerfile
+
+tasks:
+  - init: pip  install -r ./.gitpod/requirments.txt && pip install -r ./requirements.txt
+  - command: mkdocs serve
+
+
+github:
+  prebuilds:
+    # enable for the master/default branch (defaults to true)
+    master: true
+    # enable for all branches in this repo (defaults to false)
+    branches: false
+    # enable for pull requests coming from this repo (defaults to true)
+    pullRequests: true
+    # enable for pull requests coming from forks (defaults to false)
+    pullRequestsFromForks: true
+    # add a check to pull requests (defaults to true)
+    addCheck: true
+    # add a "Review in Gitpod" button as a comment to pull requests (defaults to false)
+    addComment: false
+    # add a "Review in Gitpod" button to the pull request's description (defaults to false)
+    addBadge: true
+    # add a label once the prebuild is ready to pull requests (defaults to false)
+    addLabel: false

.gitpod/.gitpod.Dockerfile

@@ -0,0 +1,7 @@
+FROM gitpod/workspace-full
+
+# Install custom tools, runtimes, etc.
+# For example "bastet", a command-line tetris clone:
+# RUN brew install bastet
+#
+# More information: https://www.gitpod.io/docs/config-docker/

.gitpod/requirements.txt

@@ -0,0 +1,3 @@
+mkdocs
+mkdocs-material
+mkdocs-minify-plugin

README.md

@@ -1,3 +1,5 @@
+[![Gitpod ready-to-code](https://img.shields.io/badge/Gitpod-ready--to--code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/selfhostedshow/wiki)
+
 # selfhostedshow/wiki
 
 ![CI Status Badge](https://github.com/selfhostedshow/wiki/workflows/Test/badge.svg)