Merge pull request #19203 from vector-im/add-cache-control-nginx

Return cache-control: no-cache from Docker nginx for /

Dockerfile

@@ -33,5 +33,8 @@ COPY --from=builder /src/webapp /app
 # Insert wasm type into Nginx mime.types file so they load correctly.
 RUN sed -i '3i\ \ \ \ application/wasm wasm\;' /etc/nginx/mime.types
 
+# Override default nginx config
+COPY /nginx/conf.d/default.conf /etc/nginx/conf.d/default.conf
+
 RUN rm -rf /usr/share/nginx/html \
   && ln -s /app /usr/share/nginx/html

nginx/conf.d/default.conf

@@ -0,0 +1,18 @@
+server {
+    listen       80;
+    listen  [::]:80;
+    server_name  localhost;
+
+    root   /usr/share/nginx/html;
+    index  index.html index.htm;
+
+    # Set no-cache for the index.html only so that browsers always check for a new copy of Element Web.
+    location = /index.html {
+        add_header Cache-Control "no-cache";
+    }
+
+    # redirect server error pages to the static page /50x.html
+    #
+    error_page   500 502 503 504  /50x.html;
+}
+