Api calls not working after ssl certificate addition

I have a web app that uses angular as client, springboot for microservices and mysql as db. a couple of days ago i have added a domain to the site and today i used lets encrypt to create an ssl certificate.

the project is run on an ubuntu vm with docker compose

reverse-proxy file for the domain below

server {    server_name full_domain_name;    location / {        proxy_pass http://local_ip:4200/ ;        proxy_http_version 1.1;        proxy_set_header Upgrade $http_upgrade;        proxy_set_header Connection 'upgrade';        proxy_set_header Host $host;        proxy_cache_bypass $http_upgrade;    }    listen 443 ssl; # managed by Certbot    ssl_certificate /etc/letsencrypt/live/full_domain_name/fullchain.pem; # managed by Certbot    ssl_certificate_key /etc/letsencrypt/live/full_domain_name/privkey.pem; # managed by Certbot    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot}# Redirect HTTP to HTTPSserver {    if ($host = full_domain_name) {        return 301 https://$host$request_uri;    }    listen 80;  # HTTP    server_name full_domain_name;    return 404; # Managed by Certbot}

the thing is after upgrading to https, the api calls stopped working.error on client console: net::ERR_SSL_PROTOCOL_ERROR

error in microservice: 2024-11-23T20:06:54.862Z INFO 1 --- [event] [nio-8081-exec-1] o.apache.coyote.http11.Http11Processor : Error parsing HTTP request headerNote: further occurrences of HTTP request parsing errors will be logged at DEBUG level.

java.lang.IllegalArgumentException: Invalid character found in method name [(characters)]. HTTP method names must be tokens

i tried updating api calls to use http instead and (of course) it wouldnt work because it is an insecure (and stupid) way of doing it: Mixed Content: The page at 'https://full_domain_name/' was loaded over HTTPS, but requested an insecure resource 'http://full_domain_name:8081/api/endpoint'. This request has been blocked; the content must be served over HTTPS.

i also tried to have nginx as a separate service in docker compose and specify the nginx.conf file in the project but that just overcomplicates the project atm