Send Content Type Headers to backend server

Problem: My website is loading my .js and .css files as type “text/html”, but only when going through haproxy.

I have a website on Host1, let’s say IP is 192.168.1.10 and that the website is my-website.com. I also have a DNS record for “my-website.com” pointing to my haproxy server, who then sends these requests to Host1.

When I access the website directly, without going through haproxy, like “https://192.168.1.10/loginpage”, everything loads correctly. When I access through https://my-website.com/loginpage", the page doesn’t load fully and when I check the browser tools, I see that the server is serving the .css and .js files as type “text/html”.

I presume I have some misconfiguration on my haproxy. How do I force haproxy to not change or to correctly set the content type headers for each file server by the backend?

Here’s a bit of the configuration of my haproxy file:

frontend fe_my-website.com
        mode http
        bind :443 ssl crt /etc/haproxy/certs/my-cert.pem alpn h2,http/1.1
        bind :80
        redirect scheme https code 301 if !{ ssl_fc }

        stick-table type ip size 5k expire 10h
        stick on src
        cookie JSESSIONID prefix

        # HSTS (63072000 seconds)
        http-response set-header Strict-Transport-Security max-age=63072000

        # ACLs for my-website.com
        acl acl_my-website hdr(host) -i my-website.com
        use_backend be_my-website if acl_my-website



# backends
backend be_my-website
        mode http
        option httpchk
        http-request set-path /loginpage
        server my-website.com host_ip:443 check ssl verify none

Thank you for your help.

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