add dockerhub auth for ci

.drone.jsonnet

@@ -16,6 +16,7 @@ local PythonVersion(pyversion='2.7') = {
 
 local PipelineLint = {
   kind: 'pipeline',
+  image_pull_secrets: ['docker_config'],
   name: 'lint',
   platform: {
     os: 'linux',
@@ -42,6 +43,7 @@ local PipelineLint = {
 
 local PipelineTest = {
   kind: 'pipeline',
+  image_pull_secrets: ['docker_config'],
   name: 'test',
   platform: {
     os: 'linux',
@@ -83,6 +85,7 @@ local PipelineTest = {
 
 local PipelineSecurity = {
   kind: 'pipeline',
+  image_pull_secrets: ['docker_config'],
   name: 'security',
   platform: {
     os: 'linux',
@@ -112,6 +115,7 @@ local PipelineSecurity = {
 
 local PipelineBuildPackage = {
   kind: 'pipeline',
+  image_pull_secrets: ['docker_config'],
   name: 'build-package',
   platform: {
     os: 'linux',
@@ -173,6 +177,7 @@ local PipelineBuildPackage = {
 
 local PipelineNotifications = {
   kind: 'pipeline',
+  image_pull_secrets: ['docker_config'],
   name: 'notifications',
   platform: {
     os: 'linux',

.drone.yml

@@ -16,6 +16,9 @@ steps:
   environment:
     PY_COLORS: 1
 
+image_pull_secrets:
+- docker_config
+
 trigger:
   ref:
   - refs/heads/master
@@ -102,6 +105,9 @@ steps:
   - python37
   - python38
 
+image_pull_secrets:
+- docker_config
+
 trigger:
   ref:
   - refs/heads/master
@@ -129,6 +135,9 @@ steps:
   environment:
     PY_COLORS: 1
 
+image_pull_secrets:
+- docker_config
+
 trigger:
   ref:
   - refs/heads/master
@@ -187,6 +196,9 @@ steps:
     ref:
     - refs/tags/**
 
+image_pull_secrets:
+- docker_config
+
 trigger:
   ref:
   - refs/heads/master
@@ -222,6 +234,9 @@ steps:
     - success
     - failure
 
+image_pull_secrets:
+- docker_config
+
 trigger:
   ref:
   - refs/heads/master
@@ -235,6 +250,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: 09f1f5c2f46dd90b159b5c5de705afce849ea7fb4772b96aa9827a6d6bb97e3e
+hmac: d107c344afb445a597ceee39eeb6ec40de5e7975391e23acd7c2b16d6c006025
 
 ...