Add Docker build and run workflow

nginx.conf.template

@@ -0,0 +1,26 @@
+server {
+  listen 80;
+  server_name _;
+
+  root /usr/share/nginx/html;
+  index index.html;
+
+  location /api/ {
+    proxy_http_version 1.1;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_pass ${NOTES_API_UPSTREAM}/;
+  }
+
+  location /assets/ {
+    try_files $uri =404;
+    expires 1y;
+    add_header Cache-Control "public, immutable";
+  }
+
+  location / {
+    try_files $uri $uri/ /index.html;
+  }
+}