chore: Support auto-SSL when running behind a forward proxy

deploy/docker/fs/opt/appsmith/entrypoint.sh

@@ -314,6 +314,9 @@ setup-custom-ca-certificates() (
     echo "-Djavax.net.ssl.trustStore=$store"
     echo "-Djavax.net.ssl.trustStorePassword=changeit"
   } > "$opts_file"
+
+  # Get certbot to use the combined trusted CA certs file.
+  export REQUESTS_CA_BUNDLE=/etc/ssl/certs/ca-certificates.crt
 )
 
 configure_supervisord() {