feat: support docker

Dockerfile

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+FROM debian
+COPY . /root
+ADD ./conf/docker/init.sh /
+RUN mkdir -p /var/www/echoIP \
+    && mv /root/* /var/www/echoIP/ \
+    && apt update \
+    && apt install -y nginx curl \
+    && apt install -y php7.3 php7.3-fpm php7.3-sqlite3 \
+    && apt clean \
+    && cp /var/www/echoIP/conf/nginx/docker/ip.conf /etc/nginx/conf.d \
+    && chmod +x /init.sh
+CMD ["sh","init.sh"]

conf/docker/init.sh

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+service php7.3-fpm start
+service nginx start
+/bin/bash

conf/nginx/docker/ip.conf

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+server {
+    listen 8080;
+    root /var/www/echoIP;
+
+    set_real_ip_from 0.0.0.0/0;
+    real_ip_header X-Real-IP;
+
+    location = / {
+        if ($http_user_agent ~* (curl|wget)) {
+            return 200 $remote_addr\n;
+        }
+        index index.html;
+    }
+
+    location = /ua {
+        if ($http_user_agent ~* (curl|wget)) {
+            return 200 $http_user_agent\n;
+        }
+        default_type application/json;
+        return 200 $http_user_agent;
+    }
+
+    location = /ip {
+        if ($http_user_agent ~* (curl|wget)) {
+            return 200 $remote_addr\n;
+        }
+        return 200 $remote_addr;
+    }
+
+    location ~* ^/([^/]+?)$ {
+        set $request_ip $1;
+        if ($http_user_agent ~* (curl|wget)) {
+            proxy_pass http://127.0.0.1:8080/info/$request_ip;
+        }
+    }
+
+    location ^~ /info {
+        set $is_cli 0;
+        set $is_https 0;
+        set $is_legal 0;
+        if ($uri ~* ^/info/?$) {
+            set $is_legal 1;
+            set $query ip=$remote_addr;
+        }
+        if ($uri ~* ^/info/([^/]+?)$) {
+            set $is_legal 1;
+            set $query ip=$1;
+        }
+        if ($is_legal = 0) {
+            return 404;
+        }
+        if ($http_user_agent ~* (curl|wget)) {
+            set $query $query&cli=true;
+        }
+        include fastcgi_params;
+        fastcgi_pass unix:/var/run/php/php7.3-fpm.sock;
+        fastcgi_param QUERY_STRING $query;
+        fastcgi_param SCRIPT_FILENAME /var/www/echoIP/backend/queryInfo.php;
+    }
+}