Add initial version of the action

Dockerfile

@@ -0,0 +1,14 @@
+FROM ubuntu:20.04
+
+RUN apk update && apk upgrade && \
+    apk add wget
+
+RUN wget https://dl.min.io/client/mc/release/linux-amd64/mc \
+    && chmod +x mc \
+    && ./mc --help
+
+# Copies your code file from your action repository to the filesystem path `/` of the container
+COPY entrypoint.sh /entrypoint.sh
+
+# Code file to execute when the docker container starts up (`entrypoint.sh`)
+ENTRYPOINT ["/entrypoint.sh"]