fix type of keywords entry in frontmatter (in /docker-hub/ dir)

keywords should be a string, not an array containing one string

Signed-off-by: Gaetan de Villele <gdevillele@gmail.com>

docker-hub/accounts.md

@@ -1,7 +1,6 @@
 ---
 description: Your Docker ID
-keywords:
+keywords: Docker, docker, trusted, sign-up, registry, accounts, plans, Dockerfile, Docker Hub, docs, documentation
-- Docker, docker, trusted, sign-up, registry, accounts, plans, Dockerfile, Docker Hub, docs,  documentation
 title: Docker ID and Docker Hub accounts
 ---
 
@@ -54,4 +53,4 @@ from the Hub.
 
 If you can't access your account for some reason, you can reset your password
 from the [*Password Reset*](https://hub.docker.com/reset-password/)
-page.
+page.

docker-hub/bitbucket.md

@@ -1,7 +1,6 @@
 ---
 description: Docker Hub Automated Builds using Bitbucket
-keywords:
+keywords: Docker, docker, registry, accounts, plans, Dockerfile, Docker Hub, docs, documentation, trusted, builds, trusted builds,  automated builds, bitbucket
-- Docker, docker, registry, accounts, plans, Dockerfile, Docker Hub, docs, documentation, trusted, builds, trusted builds,  automated builds, bitbucket
 title: Configure automated builds with Bitbucket
 ---
 
@@ -47,4 +46,4 @@ You can also manually add a webhook from your repository's **Settings** page.
 Set the URL to `https://registry.hub.docker.com/hooks/bitbucket`, to be
 triggered for repository pushes.
 
-![bitbucket-hooks](images/bitbucket-hook.png)
+![bitbucket-hooks](images/bitbucket-hook.png)

docker-hub/builds.md

@@ -1,7 +1,6 @@
 ---
 description: Docker Hub Automated Builds
-keywords:
+keywords: Dockerfile, Hub, builds, trusted builds, automated builds
-- Dockerfile, Hub, builds, trusted builds, automated builds
 title: Configure automated builds on Docker Hub
 ---
 
@@ -232,4 +231,4 @@ OK
 ```
 
 To verify everything is working correctly, check the **Last 10 Trigger Logs** on
-the page.
+the page.

docker-hub/github.md

@@ -1,7 +1,6 @@
 ---
 description: Docker Hub Automated Builds with GitHub
-keywords:
+keywords: Docker, docker, registry, accounts, plans, Dockerfile, Docker Hub, docs, documentation, trusted, builds, trusted builds,  automated builds, GitHub
-- Docker, docker, registry, accounts, plans, Dockerfile, Docker Hub, docs, documentation, trusted, builds, trusted builds,  automated builds, GitHub
 title: Configure automated builds from GitHub
 ---
 
@@ -200,4 +199,4 @@ The image below shows the "Docker" Service Hook.
 ![bitbucket-hooks](images/github-side-hook.png)
 
 If you add the "Docker" service manually, make sure the "Active" checkbox is
-selected and click the "Update service" button to save your changes.
+selected and click the "Update service" button to save your changes.

docker-hub/index.md

@@ -1,9 +1,8 @@
 ---
+description: Docker Hub overview
+keywords: Docker, docker, registry, accounts, plans, Dockerfile, Docker Hub, docs, documentation, accounts, organizations, repositories, groups, teams
 redirect_from:
 - /docker-hub/overview/
-description: Docker Hub overview
-keywords:
-- Docker, docker, registry, accounts, plans, Dockerfile, Docker Hub, docs, documentation, accounts, organizations, repositories, groups,  teams
 title: Overview of Docker Hub
 ---
 
@@ -90,4 +89,4 @@ or you can create private repositories with limited access you control.
 ### Docker commands and Docker Hub
 
 Docker itself provides access to Docker Hub services via the [`docker search`](/reference/commandline/search),
-[`pull`](/reference/commandline/pull), [`login`](/reference/commandline/login), and [`push`](/reference/commandline/push) commands.
+[`pull`](/reference/commandline/pull), [`login`](/reference/commandline/login), and [`push`](/reference/commandline/push) commands.

docker-hub/official_repos.md

@@ -1,7 +1,6 @@
 ---
 description: Guidelines for Official Repositories on Docker Hub
-keywords:
+keywords: Docker, docker, registry, accounts, plans, Dockerfile, Docker Hub, docs, official,image, documentation
-- Docker, docker, registry, accounts, plans, Dockerfile, Docker Hub, docs, official,image, documentation
 title: Official repositories on Docker Hub
 ---
 
@@ -120,4 +119,4 @@ Repositories team becomes responsible for publishing the images and
 documentation on Docker Hub. Updates to the Official Repository follow the same
 pull request process, though with less review. The Official Repositories team
 ultimately acts as a gatekeeper for all changes, which helps mitigate the risk
-of quality and security issues from being introduced.
+of quality and security issues from being introduced.

docker-hub/orgs.md

@@ -1,7 +1,6 @@
 ---
 description: Docker Hub Teams and Organizations
-keywords:
+keywords: Docker, docker, registry, teams, organizations, plans, Dockerfile, Docker Hub, docs, documentation
-- Docker, docker, registry, teams, organizations, plans, Dockerfile, Docker Hub, docs,  documentation
 title: Organizations and teams in Docker Hub
 ---
 
@@ -48,4 +47,4 @@ of the repository view:
 > `Read` access to the repository, regardless of the rights their team
 > membership has given them.
 
-![Organization repository collaborators](images/org-repo-collaborators.png)
+![Organization repository collaborators](images/org-repo-collaborators.png)

docker-hub/repos.md

@@ -1,7 +1,6 @@
 ---
 description: Your Repositories on Docker Hub
-keywords:
+keywords: Docker, docker, trusted, registry, accounts, plans, Dockerfile, Docker Hub, webhooks, docs, documentation
-- Docker, docker, trusted, registry, accounts, plans, Dockerfile, Docker Hub, webhooks, docs,  documentation
 title: Repositories on Docker Hub
 ---
 
@@ -259,4 +258,4 @@ The following parameters are recognized in callback data:
       "description": "387 tests PASSED",
       "context": "Continuous integration by Acme CI",
       "target_url": "http://ci.acme.com/results/afd339c1c3d27"
-    }
+    }

docker-hub/webhooks.md

@@ -1,7 +1,6 @@
 ---
 description: Docker Hub Automated Builds
-keywords:
+keywords: Docker, webhookds, hub, builds
-- Docker, webhookds, hub, builds
 title: Webhooks for automated builds
 ---
 
@@ -47,4 +46,4 @@ example webhook below generates an HTTP POST that delivers a JSON payload:
 
 >**Note:** If you want to test your webhook, we recommend using a tool like
 >[requestb.in](http://requestb.in/). Also note, the Docker Hub server can't be
->filtered by IP address.
+>filtered by IP address.