Domain isn't redirecting properly?

installation
1

From the Landing Pages plugin, I have a page I want to use as my home page:
forums.mysite.com/landing -

So when people go to mysite.com or www.mysite.com I want them to be taken to forums.mysite.com/landing.
Now, if someone makes a typo and goes to forum.mysite.com/landing (no “s” in “forums”), I want them to be taken to forums.mysite.com.

In my app.yml file for Discourse, I have it set up like:

  after_web_config:
    - replace:
        filename: /etc/nginx/nginx.conf
        from: /sendfile.+on;/
        to: |
          server_names_hash_bucket_size 64;
          sendfile on;
    - file:
        path: /etc/nginx/conf.d/forumsredirect1.conf
        contents: |
          server {
            listen 80;
            server_name mysite.me;
            return 301 $scheme://forums.mysite.me/landing$request_uri;
          }
    - file:
        path: /etc/nginx/conf.d/forumsredirect2.conf
        contents: |
          server {
            listen 80;
            server_name www.mysite.me;
            return 301 $scheme://forums.mysite.me/landing$request_uri;
          }          
    - file:
        path: /etc/nginx/conf.d/forumsredirect3.conf
        contents: |
          server {
            listen 80;
            server_name forum.mysite.me;
            return 301 $scheme://forums.mysite.me$request_uri;
          }

On my domain’s DNS record, I have:

bbbb
bbbb848×230 15 KB

Is all of this correct? I assume not because currently, when I go to mysite.com, it’s a dead page. However, www.mysite.com properly redirects me, BUT not to my /landing page, only the base forums.mysite.com page, and that’s only somewhat working, I assume, because of the DNS record on my domain host and not my VPS app.yml file…Help?

Can I add more than one hostname here (my base domain name) so that it works or what’s going on here?
ccc