Fully automate dev setup with Gitpod

.github/workflows/release.yml

@@ -10,8 +10,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set env
-        run: echo ::set-env name=RELEASE_VERSION::$(echo ${GITHUB_REF:11})
+      - name: Set release version
+        run: echo "RELEASE_VERSION=${GITHUB_REF:11}" >> $GITHUB_ENV
       - name: Package project
         run: |
           mkdir webthing-arduino

.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.yml

@@ -0,0 +1,5 @@
+image:
+  file: .gitpod.Dockerfile
+
+tasks:
+  - init: make

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/WebThingsIO/webthing-arduino)
+
 webthing-arduino
 ================