doc: fix typos (featbit#600)

* fix typos

* fix typos

* fix typo

CONTRIBUTING.md

@@ -67,11 +67,11 @@ But of course, you can finish your contribution and create a PR without notifyin
 - **Step 1** - [Fork](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks) this repository.
 - **Step 2** - Clone the repository to your local machine.
 - **Step 3** - Add the changes to your repository.
-- **Step 4** - Create a PULL Request from forked project to FeatBit. We may ask for changes to be made before a PR can be merge.
+- **Step 4** - Create a PULL Request from forked project to FeatBit. We may ask for changes to be made before a PR can be merged.
 - **Step 5** - Congratulations 🎉🎉 Your PR is approved and Merged !!! 
-- **Step 6** - FeatBit team thanks you. You becomes one of the contributor of FeatBit 🎉🎉 .
+- **Step 6** - FeatBit team thanks you. You become one of the contributors of FeatBit 🎉🎉 .
 
-If the steps above isn't very clear, you can search ["GitHub Forks and Pull Requests" on Youtube](https://www.youtube.com/watch?v=a_FLqX3vGR4).
+If the steps above aren't very clear, you can search ["GitHub Forks and Pull Requests" on Youtube](https://www.youtube.com/watch?v=a_FLqX3vGR4).
 
 
 ----------------------------------------------------

Development.md

@@ -72,7 +72,7 @@ npm run start:zh // Chinese, available at localhost:4201
 FeatBit should be available to everyone everywhere, and we don't want language to be a barrier. So for this reason we
 have implemented internationalization features into our codebase.
 
-FeatBit UI uses offical [@angular/localize
+FeatBit UI uses official [@angular/localize
 ](https://www.npmjs.com/package/@angular/localize) package to implement the i18n, please read
 the [official doc](https://angular.io/guide/i18n-overview) for how to use it. The language resource files are under *
 *modules/front-end/src/locale** folder, with following format messages.xx.xlf, xx is the language code.
@@ -81,8 +81,8 @@ Currently only English and Chinese are available, we would be very grateful to h
 too.
 
 If you put a text in the UI, at the end of the developing work, you need to put its translations into the corresponding
-resource file. This work could be very tedius, we created
-a [library](https://github.com/featbit/angular-locales-generator) to faciliate the job, you need to run the command
+resource file. This work could be very tedious, we created
+a [library](https://github.com/featbit/angular-locales-generator) to facilitate the job, you need to run the command
 
 ```bash
 npm run i18n

kubernetes/pro/Readme.md

@@ -16,7 +16,7 @@ A working Kubernetes Cluster such as
 
 - These files use known usernames and passwords as well as very basic configurations to facilitate an easy way to evaluate Featbit Professional on kubernetes, they should be changed for any other uses. DO NOT deploy to a production or otherwise public cluster without customizing them.
 
-- The infrastructure folder contains manifests needed to setup single instances of mongodb, clickhouse, kafka, and redis, with the exception of the *-configMap files which are derived from the configuration files found in featbit/infra/ directory of the repo. These manifests are provided as a convenience, if you have support, installation, maintanance, configuration, clustering, or any other questions regarding infrastructure components, please check with those projects respectively.
+- The infrastructure folder contains manifests needed to setup single instances of mongodb, clickhouse, kafka, and redis, with the exception of the *-configMap files which are derived from the configuration files found in featbit/infra/ directory of the repo. These manifests are provided as a convenience, if you have support, installation, maintenance, configuration, clustering, or any other questions regarding infrastructure components, please check with those projects respectively.
 
 - The manifests in the ingress folder are provided as a convenience and assume that traefik is installed and properly configured.  As such configurations are highly custom, we cannot support your specific configuration.  If you need help with traefik, please seek support from that community and their documentation.