add github action to build nginx

.github/workflows/build-nginx.yaml

@@ -0,0 +1,31 @@
+name: Deploy Nginx Image to GHCR
+
+on:
+  push:
+    paths:
+      - nginx/**
+    branches:
+      - portainer
+  workflow_dispatch:
+
+jobs:
+      push-nginx-image:
+        runs-on: ubuntu-latest
+        defaults:
+          run:
+            working-directory: './hakai_erddap_nginx_proxy'
+        steps:
+          - name: 'Checkout GitHub Action'
+            uses: actions/checkout@main
+
+          - name: 'Login to GitHub Container Registry'
+            uses: docker/login-action@v1
+            with:
+            registry: ghcr.io
+            username: hakai-it
+            password: ${{ secrets.CI_TOKEN }}
+
+          - name: 'Build Inventory Image'
+            run: |
+              docker build . --tag ghcr.io/hakaiinstitute/hakai_erddap_nginx_proxy:latest
+              docker push ghcr.io/hakaiinstitute/hakai_erddap_nginx_proxy:latest

docker-compose-portainer.yml

@@ -7,7 +7,7 @@ services :
   # must install certbot on host https://certbot.eff.org/instructions?ws=other&os=ubuntufocal
   # certbot certonly --webroot
   nginx_proxy:
-    image: nginx_proxy:latest
+    image: ghcr.io/hakaiinstitute/hakai_erddap_nginx_proxy:latest
     build:
       context: ./nginx/
       dockerfile: Dockerfile