setup django-migration-checker package source from pip

[why] the issues already be fixed in the original repo, doesn't need to use the fork repo anymore

Dockerfile

@@ -1,7 +1,8 @@
-FROM python:3.6.12-alpine3.12
+FROM python:3.11.9-alpine
+ARG VERSION="0.8.0"
 
 RUN apk add --no-cache git
 RUN python -m pip install --no-cache-dir --upgrade pip
-RUN pip install --no-cache-dir git+git://github.com/Falldog/django-migration-checker
+RUN pip install --no-cache-dir django-migration-checker==${VERSION}
 
 ENTRYPOINT ["django-find-conflicts"]

action.yml

@@ -11,7 +11,7 @@ inputs:
     default: 'app'
 
 runs:
-  using: docker
-  image: docker://hardcoretech/django-migration-checker:latest
+  using: 'docker'
+  image: 'Dockerfile'
   args: 
     - ${{ inputs.app-path }}