Add Ingress Support (#1)

* Add ingress support

* Development framework

* Add ARCH arg for correct s6 version

* Support new ARCH arg for correct s6 overlay version

* Add PR trigger to workflow

* Add image again

Co-authored-by: Matt White <matt.white@microsoft.com>

services/nginx/teslamate.conf

@@ -0,0 +1,42 @@
+# Enable gzipping of responses.                  
+gzip on;
+
+map $http_upgrade $connection_upgrade {
+    default upgrade;
+    '' close;
+}
+
+server {
+    server_name _;
+    listen 8099 default_server;
+
+    location / {
+        proxy_pass http://localhost:4000/;        
+        proxy_http_version 1.1;
+
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection $connection_upgrade;
+        proxy_set_header Host $host;
+
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header Referer $http_referer;
+        
+        # Disable encoding to allow the sub_filter to work
+        proxy_set_header Accept-Encoding "";
+        
+        # Enable sub-filtering
+        sub_filter_types text/css text/xml application/javascript;
+        sub_filter_once off;
+
+        # Home URLs in the HTML
+        sub_filter 'href="/"' 'href="$http_x_ingress_path/"';
+        
+        # Fonts in the CSS
+        sub_filter 'url(/' 'url($http_x_ingress_path/';
+
+        # Update fixed paths in the .js files
+        sub_filter '"/live"' '"$http_x_ingress_path/live"';
+        sub_filter '"/js/"' '"$http_x_ingress_path/js/"';
+    }
+}