How to point custom domain to VM instance - nginx

Question

These are my dns records:
Name | Type | TTL | Target
A 3600 185.199.108.153
A 3600 185.199.109.153
A 3600 185.199.110.153
A 3600 185.199.111.153
www CNAME 3600 pushp1997.github.io
A 3600 34.71.130.252
Here, the first 5 entries are to open my static github pages site.
The last entry is the ip address of my VM instance on GCloud.
These are my nginx server settings:
server {
listen 80;
server_name pushp.ml;
location /linkedin {
return 302 https://in.linkedin.com/in/pushp-vashisht;
}
}
Now, if I try 34.71.130.252/linkedin it redirects me to https://in.linkedin.com/in/pushp-vashisht.
But, when I try pushp.ml/linkedin it shows a 404 page of Github Pages.
How do I make pushp.ml/linkedin to redirect to https://in.linkedin.com/in/pushp-vashisht?
Edit:
On running dig command:
$ dig pushp.ml
; <<>> DiG 9.11.3-1ubuntu1.12-Ubuntu <<>> pushp.ml
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36898
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;pushp.ml. IN A
;; ANSWER SECTION:
pushp.ml. 3600 IN A 185.199.109.153
pushp.ml. 3600 IN A 185.199.110.153
pushp.ml. 3600 IN A 34.71.130.252
pushp.ml. 3600 IN A 185.199.108.153
pushp.ml. 3600 IN A 185.199.111.153
;; Query time: 431 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Fri Jul 17 17:13:57 EDT 2020
;; MSG SIZE rcvd: 117
In answer section we can see that ip addresses of github pages server as well as my vm instance are there.