diff --git a/Dockerfile b/Dockerfile
index 123da62..496dba3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,8 @@
+# Container image that runs your code
 FROM alpine:latest
-ADD entrypoint.sh /entrypoint.sh
-RUN chmod +x /entrypoint.sh
+
+# 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"]
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diff --git a/action.yml b/action.yml
index 3f84e67..7e2c158 100644
--- a/action.yml
+++ b/action.yml
@@ -4,11 +4,16 @@ author: 'Ricardo Canastro'
 inputs:
   source:
     description: 'Source file'
+    required: true
   target:
     description: 'Target file'
+    required: true
 runs:
   using: 'docker'
   image: 'Dockerfile'
+  args: 
+    - ${{inputs.source}}
+    - ${{inputs.target}}
 branding:
   icon: 'copy'
   color: 'green'
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diff --git a/entrypoint.sh b/entrypoint.sh
old mode 100644
new mode 100755
index a31d73f..358be33
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,6 +1,3 @@
-#!/bin/bash
+#!/bin/sh -l
 
-set -e
-set -o pipefail
-
-sh -c "cp $*"
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+cp $1 $2
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