diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index cfd542a..0000000
--- a/Dockerfile
+++ /dev/null
@@ -1,4 +0,0 @@
-FROM node:lts-alpine3.9
-RUN apk update && apk add --no-cache bash git openssh
-COPY entrypoint.sh /entrypoint.sh
-ENTRYPOINT ["/entrypoint.sh"]
diff --git a/action.yml b/action.yml
index a0d155c..ebe05a8 100644
--- a/action.yml
+++ b/action.yml
@@ -7,7 +7,7 @@ inputs:
   commit_message:
     description: Commit message, will be ignored if used with same_commit
     required: false
-    default: 'Prettified Code!'
+    default: "Prettified Code!"
   same_commit:
     description: Update the current commit instead of creating a new one
     required: false
@@ -18,11 +18,11 @@ inputs:
   file_pattern:
     description: File pattern used for `git add`, can't be used with only_changed!
     required: false
-    default: '*'
+    default: "*"
   prettier_options:
     description: Options for the `prettier` command
     required: false
-    default: '--write **/*.js'
+    default: "--write **/*.js"
   dry:
     description: Running the script in dry mode just shows whether there are files that should be prettified or not
     required: false
@@ -38,12 +38,27 @@ inputs:
   prettier_plugins:
     description: Install Prettier plugins, i.e. `@prettier/prettier-php @prettier/some-other-plugin`
     required: false
-    default: ''
+    default: ""
 
 runs:
-  using: 'docker'
-  image: 'Dockerfile'
+  using: "composite"
+  steps:
+    - name: Prettify code!
+      shell: bash
+      run: >-
+        PATH=$(cd $GITHUB_ACTION_PATH; npm bin):$PATH
+        ${{ github.action_path }}/entrypoint.sh
+      env:
+        INPUT_COMMIT_MESSAGE: ${{ inputs.commit_message }}
+        INPUT_SAME_COMMIT: ${{ inputs.same_commit }}
+        INPUT_COMMIT_OPTIONS: ${{ inputs.commit_options }}
+        INPUT_FILE_PATTERN: ${{ inputs.file_pattern }}
+        INPUT_PRETTIER_OPTIONS: ${{ inputs.prettier_options }}
+        INPUT_DRY: ${{ inputs.dry }}
+        INPUT_PRETTIER_VERSION: ${{ inputs.prettier_version }}
+        INPUT_ONLY_CHANGED: ${{ inputs.only_changed }}
+        INPUT_PRETTIER_PLUGINS: ${{ inputs.prettier_plugins }}
 
 branding:
-  icon: 'award'
-  color: 'green'
+  icon: "award"
+  color: "green"
diff --git a/entrypoint.sh b/entrypoint.sh
index 023e697..eb078cb 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # e is for exiting the script automatically if a command fails, u is for exiting if a variable is not set
 # x would be for showing the commands before they are executed
 set -eu
@@ -25,14 +25,18 @@ _git_changed() {
     [[ -n "$(git status -s)" ]]
 }
 
+(
 # PROGRAM
+# Changing to the directory
+cd "$GITHUB_ACTION_PATH"
+
 echo "Installing prettier..."
 case $INPUT_PRETTIER_VERSION in
     false)
-        npm install --silent --global prettier
+        npm install --silent prettier
         ;;
     *)
-        npm install --silent --global prettier@$INPUT_PRETTIER_VERSION
+        npm install --silent prettier@$INPUT_PRETTIER_VERSION
         ;;
 esac
 
@@ -46,13 +50,18 @@ if [ -n "$INPUT_PRETTIER_PLUGINS" ]; then
             exit 1
         fi
     done
-    npm install --silent --global $INPUT_PRETTIER_PLUGINS
+    npm install --silent $INPUT_PRETTIER_PLUGINS
 fi
+)
 
 echo "Prettifing files..."
 echo "Files:"
 prettier $INPUT_PRETTIER_OPTIONS || echo "Problem running prettier with $INPUT_PRETTIER_OPTIONS"
 
+# Ignore node modules and other action created files
+rm -r node_modules/ || echo "No node_modules/ folder."
+git reset --hard package-lock.json || rm package-lock.json || echo "No package-lock.json file."
+
 # To keep runtime good, just continue if something was changed
 if _git_changed; then
   if $INPUT_DRY; then