refactor dockerfile

proxy_pool/Dockerfile

@@ -1,15 +1,21 @@
+# Base image
 FROM alpine:latest
 
-
-RUN apk add openvpn openresolv supervisor squid dante-server bash && \
+RUN apk add openvpn \
+    openresolv \
+    supervisor \
+    squid \
+    dante-server bash && \
+    # ProtonVPN DNS update scripts: https://protonvpn.com/support/linux-openvpn/
     wget "https://raw.githubusercontent.com/ProtonVPN/scripts/master/update-resolv-conf.sh" -O "/etc/openvpn/update-resolv-conf" && \
     chmod +x "/etc/openvpn/update-resolv-conf"
 
-COPY supervisord.conf /etc/supervisord.conf
+# Copy the config file of supervisord, Squid HTTP Proxy, and Dante SOCKS Proxy
+COPY supervisord.conf sockd.conf /etc/
 COPY squid.conf /etc/squid/squid.conf
-COPY sockd.conf /etc/sockd.conf
-
 
+# Squid Proxy on 8888, and Dante on 8881
 EXPOSE 8888 8881
 
+#  Starts Dante, Squid and OpenVPN via supervisord
 CMD ["/usr/bin/supervisord", "-c", "/etc/supervisord.conf"]