Adds the config:set for defaultdevhubusername since it's necessary after all; update README with a badge

Author: daveespo

.github/workflows/deploy.and.test.yml

@@ -18,6 +18,7 @@ jobs:
         uses: apex-enterprise-patterns/setup-sfdx@v1 #We're using a fork of https://github.com/sfdx-actions/setup-sfdx for safety
         with:
           sfdx-auth-url: ${{ secrets.DEVHUB_SFDXURL }}
+      - run: sfdx force:config:set defaultdevhubusername=SFDX-ENV -g #Even though the setup-sfdx action uses --setdefaultdevhubusername, it doesn't seem to stick since it uses --setdefaultusername so we brute force it here
       - run: echo y | sfdx plugins:install shane-sfdx-plugins
       - run: sfdx force:org:create -f config/project-scratch-def.json --setdefaultusername -d 1
       - run: sfdx shane:github:src:install -c -g apex-enterprise-patterns -r fflib-apex-mocks -p sfdx-source/apex-mocks

README.md

@@ -1,5 +1,6 @@
 FFLib Apex Common Sample
 ========================
+![Push Source and Run Apex Tests](https://github.com/apex-enterprise-patterns/fflib-apex-common-samplecode/workflows/Create%20a%20Scratch%20Org,%20Push%20Source%20and%20Run%20Apex%20Tests/badge.svg)
 
 **Dependencies:** Must deploy [Apex Mocks](https://github.com/apex-enterprise-patterns/fflib-apex-mocks) and [Apex Common](https://github.com/apex-enterprise-patterns/fflib-apex-common) before deploying this library