fix: prevent stale webmail shell cache

deploy/all-in-one/nginx.conf

@@ -17,7 +17,17 @@ server {
     proxy_pass http://127.0.0.1:8080/healthz;
   }
 
+  location = /index.html {
+    add_header Cache-Control "no-store, no-cache, must-revalidate" always;
+  }
+
+  location /assets/ {
+    add_header Cache-Control "public, max-age=31536000, immutable" always;
+    try_files $uri =404;
+  }
+
   location / {
+    add_header Cache-Control "no-store, no-cache, must-revalidate" always;
     try_files $uri $uri/ /index.html;
   }
 }

deploy/nginx/web.conf

@@ -3,5 +3,15 @@ server {
   server_name _;
   root /usr/share/nginx/html;
   index index.html;
-  location / { try_files $uri $uri/ /index.html; }
+  location = /index.html {
+    add_header Cache-Control "no-store, no-cache, must-revalidate" always;
+  }
+  location /assets/ {
+    add_header Cache-Control "public, max-age=31536000, immutable" always;
+    try_files $uri =404;
+  }
+  location / {
+    add_header Cache-Control "no-store, no-cache, must-revalidate" always;
+    try_files $uri $uri/ /index.html;
+  }
 }