Added OptiPNG Lossless compression

Dockerfile

@@ -1,4 +1,4 @@
 FROM node:lts-alpine3.9
-RUN apk update && apk upgrade && apk add --no-cache bash git openssh
+RUN apk update && apk upgrade && apk add --no-cache bash git openssh optipng
 COPY entrypoint.sh /entrypoint.sh
 ENTRYPOINT ["/entrypoint.sh"]

action.yml

@@ -1,5 +1,5 @@
-name: Prettier Action
-description: Automatically runs prettier on all your changes.
+name: Crush Action
+description: Losslessly reduces file size for PNGs
 
 author: Conrad Großer <grosserconrad@gmail.com>
 
@@ -7,7 +7,7 @@ inputs:
   commit_message:
     description: Commit message
     required: false
-    default: 'Prettified Code!'
+    default: 'Optimised your images!'
   commit_options:
     description: Commit options
     required: false

entrypoint.sh

@@ -36,7 +36,7 @@ _git_push() {
 }
 
 # PROGRAM
-# TODO: Add actual commands for compressing
+find -type f -name "*.png" -exec optipng -nc -nb -o7 {} \;
 
 # To keep runtime good, just continue if something was changed
 if _git_changed;