nginx automatically generates configuration files in docker container

docker run -d -p 80:80 -e xxx=xx Image name Script path in the image

#!/bin/bash

#Get the lt beginning from the environment variable to distinguish it from other environment variables, for example, lt_analysis=172.17.0.1:8083
result=""
for a in $(env | grep ^lt)
do
 OLD_IFS="$IFS"
 IFS="_"
 arr=($a)
 b=${arr[1]}
 IFS="="
 arr=($b)
 IFS="$OLD_IFS"
 result="${result}
  location /${arr[0]}/ {
    proxy_pass http://${arr[1]}/${arr[0]}/;
    proxy_connect_timeout 90;
    proxy_send_timeout 90;
    proxy_read_timeout 90;
  }"
done
#Replace the variable result in the nginx_conf configuration file
sed -i "s|nginx_conf|$(echo ${result})|g" /etc/nginx/nginx.conf
cd /usr/sbin
./nginx

http {
  ...
  
  server {
    ...

    location / {
      root html;
      index index.html index.htm;
    }

    nginx_conf

    #error_page 404 /404.html;
    ...

FROM centos

ENV NGINX_VERSION 1.10.3
ENV OPENSSL_VERSION 1.0.2k
ENV PCRE_VERSION 8.40
ENV ZLIB_VERSION 1.2.11
ENV BUILD_ROOT /usr/local/xx/nginx

# In order to reduce the space occupied by the final generated image, the yum update command is not executed here, which may not be a good practice. # In order to speed up the build, the 163 installation source is used here. #RUN yum -y update \
RUN yum -y install curl \
  && mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup \
  && curl http://mirrors.163.com/.help/CentOS7-Base-163.repo -o /etc/yum.repos.d/CentOS7-Base-163.repo \ 
  && yum -y install gcc gcc-c++ make perl zip unzip \
  && mkdir -p $BUILD_ROOT \
  && cd $BUILD_ROOT \
  && curl https://ftp.pcre.org/pub/pcre/pcre-$PCRE_VERSION.zip -o $BUILD_ROOT/pcre-$PCRE_VERSION.zip \
  && curl https://www.openssl.org/source/openssl-$OPENSSL_VERSION.tar.gz -o $BUILD_ROOT/openssl-$OPENSSL_VERSION.tar.gz \
  && curl http://www.zlib.net/zlib-$ZLIB_VERSION.tar.gz -o $BUILD_ROOT/zlib-$ZLIB_VERSION.tar.gz \
  && curl https://nginx.org/download/nginx-$NGINX_VERSION.tar.gz -o $BUILD_ROOT/nginx-$NGINX_VERSION.tar.gz \
  && tar vxzf nginx-$NGINX_VERSION.tar.gz \
  && unzip pcre-$PCRE_VERSION.zip \
  && tar vxfz zlib-$ZLIB_VERSION.tar.gz \
  && tar vxfz openssl-$OPENSSL_VERSION.tar.gz \
  && cd nginx-$NGINX_VERSION \
  && BUILD_CONFIG="\
    --prefix=/etc/nginx \
    --sbin-path=/usr/sbin/nginx \
    --conf-path=/etc/nginx/nginx.conf \
    --error-log-path=/var/log/nginx/error.log \
    --http-log-path=/var/log/nginx/access.log \
    --pid-path=/var/run/nginx.pid \
    --lock-path=/var/run/nginx.lock \
    --http-client-body-temp-path=/var/cache/nginx/client_temp \
    --http-proxy-temp-path=/var/cache/nginx/proxy_temp \
    --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp \
    --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp \
    --http-scgi-temp-path=/var/cache/nginx/scgi_temp \
    --with-openssl=$BUILD_ROOT/openssl-$OPENSSL_VERSION \
    --with-pcre=$BUILD_ROOT/pcre-$PCRE_VERSION \
    --with-zlib=$BUILD_ROOT/zlib-$ZLIB_VERSION \
    --with-http_ssl_module \
    --with-http_v2_module \ 
    --with-threads \
    " \
  && mkdir -p /var/cache/nginx \
  && ./configure $BUILD_CONFIG \
  && make && make install \
  && rm -rf $BUILD_ROOT \
  && yum -y remove gcc gcc-c++ make perl zip unzip \
  && yum clean all

#Replace the nginx default file COPY nginx.conf /etc/nginx/
#Add a shell script to automatically generate a configuration file COPY script name /root/

#Expose ports EXPOSE 80 443

CMD ["nginx", "-g", "daemon off;"]

#user nobody;
worker_processes 1;

#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;

#pid logs/nginx.pid;
daemon off; //Add here to turn off background running events {
  worker_connections 1024;
}


http {