Add downloaded mc binary to PATH

Dockerfile

@@ -5,7 +5,8 @@ RUN apt-get update && \
 
 RUN wget https://dl.min.io/client/mc/release/linux-amd64/mc \
     && chmod +x mc \
-    && ./mc --help
+    && echo $(pwd) >> $GITHUB_PATH \
+    && mc --help
 
 # Copies your code file from your action repository to the filesystem path `/` of the container
 COPY entrypoint.sh /entrypoint.sh