added initial test addon commands

Dockerfile

@@ -0,0 +1,7 @@
+ARG BUILD_FROM
+FROM $BUILD_FROM
+
+COPY run.sh /
+RUN chmod a+x /run.sh
+
+CMD [ "/run.sh" ]

config.yaml

@@ -0,0 +1,10 @@
+name: "Hello world"
+description: "My first addon"
+version: "1.0.0"
+slug: "hello_world"
+arch:
+  - aarch64
+  - amd64
+  - armhf
+  - armv7
+  - i386

run.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/with-contenv bashio
+
+echo "Hello world!"