add release action

.github/workflows/ci.yaml

@@ -1,5 +1,8 @@
 name: Run Django tests for TubeSync
 
+env:
+  IMAGE_NAME: tubesync
+
 on:
   push:
     branches:
@@ -40,8 +43,5 @@ jobs:
     - name: Push image to GitHub Container Registry
       run: |
         LATEST_TAG=ghcr.io/meeb/$IMAGE_NAME:latest
-        DATED_TAG=ghcr.io/meeb/$IMAGE_NAME:$(date +%s)
         docker tag $IMAGE_NAME $LATEST_TAG
-        docker tag $IMAGE_NAME $DATED_TAG
         docker push $LATEST_TAG
-        docker push $DATED_TAG