Add Github Action

.github/workflows/update_data.yml

@@ -0,0 +1,24 @@
+name: Update data
+on:
+  workflow_dispatch:
+  schedule:
+    - cron:  '15 0 * * *'
+jobs:
+  scrape:
+    name: Update data
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: |
+          wget -O data-full.json https://lz4.overpass-api.de/api/interpreter\?data\=%0A%09%09%09%5Bout%3Ajson%5D%5Btimeout%3A200%5D%3B%0A%09%09%09%2F%2F%20gather%20results%0A%09%09%09\(%0A%09%09%09%20%20%2F%2F%20query%20part%20for%3A%20%E2%80%9C%22seamark%3Alight%3Asequence%22%3D\*%E2%80%9D%0A%09%09%09%20%20node%5B%22seamark%3Alight%3Asequence%22%5D\(-90%2C-180%2C90%2C180\)%3B%0A%09%09%09%20%20way%5B%22seamark%3Alight%3Asequence%22%5D\(-90%2C-180%2C90%2C180\)%3B%0A%09%09%09\)%3B%0A%09%09%09%2F%2F%20print%20results%0A%09%09%09out%20body%3B%0A%09%09%09%3E%3B%0A%09%09%09out%20skel%20qt%3B%0A%09%09
+      - name: Commit the data
+        uses: nick-invision/retry@v2
+        with:
+          timeout_seconds: 10
+          max_attempts: 5
+          command: |
+            git config --global user.name 'Pierre Mesure (Github Actions)'
+            git config --global user.email 'pierre@mesu.re'
+            git add data-full.json
+            git commit -am "Updating the data"
+            git push

README.md

@@ -1,3 +1,12 @@
+# THIS IS A FORK
+
+I did not create this code, the original source is [here](https://github.com/geodienst/lighthousemap) and the map [here](https://geodienst.github.io/lighthousemap/).
+
+Like many others, I learnt about this beautiful gem of data visualisation thanks to this [viral tweet](https://twitter.com/emollick/status/1485467613190832130). I love it! This is such a great example of what can be accomplished with OpenStreetMap and crowdsourced data!
+
+But I was equally disappointed as many others to see that the data hadn't been updated in 3 years.
+
+So I dug in the code and found the Overpass query to fetch up-to-date data. And while I was at it, I added a Github Action to keep it updated. It runs every day at 00:15 CET for now, and I might make it update less often later to use even less energy.
 # Beacon map
 This map shows all the blinking beacons from [OpenStreetMap](https://www.openstreetmap.org/).