readme

README.md

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+# get-image-env-var
+Github/Gitea action used to get a docker image environment variable
+```yml
+name: echo env var
+on: [push]
+
+jobs:
+  get-env:
+    runs-on: ubuntu-latest
+    container:
+      image: catthehacker/ubuntu:act-latest
+    steps:
+      - name: get env var
+        id: getenv
+        uses: https://gitea.ar2000.me/ar2000/get-image-env-var@v2
+        with:
+          name: NEXTCLOUD_VERSION
+          image: nextcloud:latest
+      - name: echo
+        run: echo ${{steps.getenv.outputs.value}}
+```
+If you get a docker not found error make sure you are using the `catthehacker/ubuntu:act-latest` image as your job's container.