docker: Add an ENTRYPOINT to run container as debos executable

The ENTRYPOINT set the image’s main command, allowing that image to
be run as though it was that command. With 'docker run', the command
parameters could be passed directly after the container's name.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

docker/Dockerfile

@@ -74,3 +74,5 @@ RUN apt-get update && \
     rm -rf /var/lib/apt/lists/*
 
 COPY --from=builder $GOPATH/bin/debos /usr/local/bin/debos
+
+ENTRYPOINT ["/usr/local/bin/debos"]

docker/README.md

@@ -15,7 +15,7 @@ Check that `kvm` is enabled and writable by the user running the docker containe
 To build `recipe.yaml`:
 ```
 cd <PATH_TO_RECIPE_DIR>
-docker run --rm --interactive --tty --device /dev/kvm --user $(id -u) --workdir /recipes --mount "type=bind,source=$(pwd),destination=/recipes" --security-opt label=disable godebos/debos debos <RECIPE.yaml>
+docker run --rm --interactive --tty --device /dev/kvm --user $(id -u) --workdir /recipes --mount "type=bind,source=$(pwd),destination=/recipes" --security-opt label=disable godebos/debos <RECIPE.yaml>
 ```
 
 ## Container build

docker/recipes.test.yml

@@ -11,4 +11,4 @@ services:
             source: ./tests
             target: /recipes
         working_dir: /recipes
-        command: debos simple-recipe.yaml
+        command: simple-recipe.yaml