Add dev/main branching workflow and roadmap

- CI builds :dev tag on push to dev, :latest on push to main
- Add roadmap to README (external monitoring, enhanced dashboard, multi-modem)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: itsDNNS

.github/workflows/docker.yml

@@ -2,7 +2,7 @@ name: Build and Push Docker Image
 
 on:
   push:
-    branches: [master]
+    branches: [main, dev]
   workflow_dispatch:
 
 env:
@@ -33,7 +33,8 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |
-            type=raw,value=latest
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
+            type=raw,value=dev,enable=${{ github.ref == 'refs/heads/dev' }}
             type=sha,prefix=
 
       - name: Build and push

README.md

@@ -117,6 +117,22 @@ Copy `.env.example` to `.env` and edit:
 - AVM FRITZ!Box Cable router (tested with 6690 Cable)
 - MQTT broker (e.g., Mosquitto) - optional, for Home Assistant integration
 
+## Roadmap
+
+### External Monitoring Integration
+- [ ] **ThinkBroadband BQM**: Daily fetch and archive of external broadband quality graphs (latency, packet loss)
+- [ ] **Speedtest Tracker**: Pull speed test results (download, upload, ping, jitter) from self-hosted [Speedtest Tracker](https://github.com/alexjustesen/speedtest-tracker)
+
+### Enhanced Dashboard
+- [ ] Combined timeline: DOCSIS health + speed tests + BQM graph on a single time axis
+- [ ] Notification system: Webhooks on health degradation
+- [ ] Mobile-responsive layout
+
+### Multi-Modem Support
+- [ ] Plugin architecture for modem drivers
+- [ ] SNMP-based generic driver for non-FritzBox cable modems
+- [ ] Community-contributed drivers (Arris, Technicolor, Sagemcom)
+
 ## Contributing
 
 See [CONTRIBUTING.md](CONTRIBUTING.md) for development setup and guidelines.