Add container specification and shell definitions to deployment workflows

.gitea/workflows/deploy-dev.yml

@@ -9,9 +9,12 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    container:
+      image: catthehacker/ubuntu:act-latest
     
     steps:
       - name: Checkout code
+        shell: sh
         run: |
           git clone $GITHUB_SERVER_URL/$GITHUB_REPOSITORY.git /workspace/repo || true
           cd /workspace/repo
@@ -20,12 +23,14 @@ jobs:
           git pull origin $GITHUB_REF_NAME
 
       - name: Build Docker Image
+        shell: sh
         run: |
           cd /workspace/repo
           docker build -t merchbay_admin:dev .
           docker save merchbay_admin:dev | gzip > merchbay_admin_dev.tar.gz
 
       - name: Setup SSH and Deploy
+        shell: sh
         run: |
           mkdir -p ~/.ssh
           printf '%s' "$DEPLOY_SSH_KEY" > ~/.ssh/deploy_key
@@ -80,6 +85,7 @@ jobs:
           DEV_DB_PASSWORD: ${{ secrets.DEV_DB_PASSWORD }}
 
       - name: Health Check
+        shell: sh
         run: |
           sleep 10
           curl -f https://dev.merchbay.app || exit 1