Add tempio (#27)

Author: frenck

README.md

@@ -36,6 +36,7 @@ repository contain some extras:
 - Adds `jq` & `curl`, since every add-on uses them.
 - Adds Docker [Label Schema][label-schema] support.
 - Includes a helper library: [Bashio][bashio]
+- Includes template helper: [tempio][tempio]
 - Handles logs, add-on startup banners and update notifications.
 - Several small adjustments and improvements.
 
@@ -147,3 +148,4 @@ SOFTWARE.
 [repository]: https://github.com/hassio-addons/repository
 [s6]: http://skarnet.org/software/s6/overview.html
 [semver]: http://semver.org/spec/v2.0.0.html
+[tempio]: https://github.com/home-assistant/tempio

base/Dockerfile

@@ -49,6 +49,10 @@ RUN \
     && mv /tmp/bashio/lib /usr/lib/bashio \
     && ln -s /usr/lib/bashio/bashio /usr/bin/bashio \
     \
+    && curl -L -s -o /usr/bin/tempio \
+        "https://github.com/home-assistant/tempio/releases/download/2021.01.0/tempio_${BUILD_ARCH}" \
+    && chmod a+x /usr/bin/tempio \
+    \
     && rm -fr \
         /tmp/* \
         /var/{cache,log}/* \