dockerhub login for build in drone cloud

https://discourse.drone.io/t/how-to-prevent-dockerhub-pull-rate-limit-errors/8324

.drone.yml

@@ -17,6 +17,8 @@ steps:
     username: b4tman
     password:
       from_secret: docker_password
+    config:
+      from_secret: docker_config
 - name: squid-armhf image for github packages
   image: plugins/docker
   settings:
@@ -27,6 +29,8 @@ steps:
     username: b4tman
     password:
       from_secret: github_password
+    config:
+      from_secret: docker_config
 trigger:
   ref:
   - refs/tags/**

Dockerfile

@@ -1,6 +1,6 @@
-FROM alpine:3.13.1 as build
+FROM alpine:3.13.5 as build
 
-ENV SQUID_VER 4.14
+ENV SQUID_VER 4.15
 ENV SQUID_SIG_KEY B06884EDB779C89B044E64E3CD6DBF8EF3B17D3E
 
 RUN set -x && \
@@ -104,7 +104,7 @@ RUN set -x && \
 RUN sed -i '1s;^;include /etc/squid/conf.d/*.conf\n;' /etc/squid/squid.conf
 RUN echo 'include /etc/squid/conf.d.tail/*.conf' >> /etc/squid/squid.conf
 
-FROM alpine:3.13.1
+FROM alpine:3.13.5
 	
 ENV SQUID_CONFIG_FILE /etc/squid/squid.conf
 ENV TZ Europe/Moscow