Feature/docker stable setup (#296)

* Added stable docker workflow

* Changed webui pull to develop

.github/workflows/nightly-docker.yml

@@ -17,7 +17,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: Kareadita/Kavita-webui
-          ref: feature/sentry-release
+          ref: develop
           path: Kavita-webui/
 
       - name: NodeJS to Compile WebUI
@@ -69,4 +69,4 @@ jobs:
             description: 
             details: 'https://hub.docker.com/r/kizaing/kavita/tags?page=1&ordering=last_updated'
             text: A new nightly build has been released for docker.
-            webhookUrl: ${{ secrets.DISCORD_DOCKER_UPDATE_URL }}
+            webhookUrl: ${{ secrets.DISCORD_DOCKER_UPDATE_URL }}