Authorization by username and password (#668)

* Auth

* Logout

* Lint fix

* Small hassio fix

* Reverted uppercase

* Secrets editor

* Reverted secrets editor

* Reverted log height

* Fix default username

docker/Dockerfile

@@ -4,6 +4,9 @@ FROM ${BUILD_FROM}
 COPY . .
 RUN pip2 install --no-cache-dir -e .
 
+ENV USERNAME=""
+ENV PASSWORD=""
+
 WORKDIR /config
 ENTRYPOINT ["esphome"]
 CMD ["/config", "dashboard"]