Fix CI by using DockerHub credentials

Also deletes push workflow as it's not needed in this repo.

Author: gtopper

.github/workflows/pr.yml

@@ -39,6 +39,9 @@ jobs:
     runs-on: [ self-hosted, Linux ]
     container:
       image: python:3.9.18
+      credentials:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN_PUBLIC }}
 
     steps:
       - uses: actions/checkout@v3

.github/workflows/push.yml

@@ -24,6 +24,9 @@ jobs:
     runs-on: [ self-hosted, Linux ]
     container:
       image: python:3.9.18
+      credentials:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN_PUBLIC }}
 
     steps:
       - uses: actions/checkout@v3