在 nginx 配置文件中，重复性配置的复用方法

比如在一个 nginx 服务器中配置了多个二级域名，可能有一些关于 SSL 和其它安全 Header 的配置是大量重复的

每次添加或修改的话，都需要手动复制或替换很多地方，容易疏漏

可以将相同的配置统一写在一个文件中，在各处使用 include 引用即可。

1、新建一个文件，将所需配置存入其中（如保存至文件 /home/shared.conf）

listen              443 ssl;
listen              [::]:443 ssl;
root                e:/projects/TheVegCat/src/main/resources/static/;
ssl_certificate     e:/projects/TheVegCat/ssl/CA/localhost/localhost.crt;
ssl_certificate_key e:/projects/TheVegCat/ssl/CA/localhost/localhost.decrypted.key;
add_header          Strict-Transport-Security "max-age=10368000; includeSubDomains" always;
gzip                on;
gzip_min_length     512;
gzip_proxied        expired no-cache no-store private auth;
gzip_types          text/plain application/xml text/css application/javascript application/json;
location ~ ^(.+)\.(ico|png|xml|json)$ {
    expires         1y;
    alias           e:/projects/TheVegCat/src/main/resources/static/favicon/;
    try_files       $1.$2 $1.$2/;
}

2、在 nginx.conf 中，使用 include 引用即可（路径不限）

server {
    server_name         localhost thevegcat.lan;
    include /home/shared.conf;
    location / {
        add_header      Strict-Transport-Security "max-age=10368000; includeSubDomains" always;
        proxy_pass      http://localhost:8080;
    }
}

server {
    server_name         veganskivodic.thevegcat.lan;
    include /home/shared.conf;
    location / {
        add_header      Strict-Transport-Security "max-age=10368000; includeSubDomains" always;
        proxy_pass      http://veganskivodic.thevegcat.lan:8080;
    }
}

参考：https://serverfault.com/questions/1125363/avoid-duplicate-nginx-server-definition