diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 000000000..42065d27b
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,70 @@
+# Contribution Guide
+
+Welcome and thank you for considering contributing to Gorse!
+
+Reading and following these guidelines will help us make the contribution process easy and effective for everyone involved. It also communicates that you agree to respect the time of the developers managing and developing these open source projects. In return, we will reciprocate that respect by addressing your issue, assessing changes, and helping you finalize your pull requests.
+
+* [Getting Started](#getting-started)
+  * [Setup Develop Environment](#setup-develop-environment)
+  * [Run Unit Tests](#run-unit-tests)
+* [Getting Help](#getting-help)
+
+## Getting Started
+
+### Setup Develop Environment
+
+These following installations are required:
+
+- **Go** (>= 1.18): Since Go features from 1.18 are used in Gorse, the version of the compiler must be greater than 1.18. GoLand or Visual Studio Code is highly recommended as the IDE to develop Gorse.
+
+- **Docker Compose**: Multiple databases are required for unit tests. It's convenient to manage databases on Docker Compose.
+
+```bash
+cd misc/database_test
+
+docker-compose up -d
+```
+
+### Run Unit Tests
+
+Most logics in Gorse are covered by unit tests. Run unit tests by the following command:
+
+```bash
+go test -v ./...
+```
+
+The default database URLs are directed to these databases in `misc/database_test/docker-compose.yml`. Test databases could be overrode by setting following environment variables:
+
+| Environment Value | Default Value |
+|---|---|
+| `MYSQL_URI` | `mysql://root:password@tcp(127.0.0.1:3306)/` |
+| `POSTGRES_URI` | `postgres://gorse:gorse_pass@127.0.0.1/` |
+| `MONGO_URI` | `mongodb://root:password@127.0.0.1:27017/` |
+| `CLICKHOUSE_URI` | `clickhouse://127.0.0.1:8123/` |
+| `REDIS_URI` | `redis://127.0.0.1:6379/` |
+
+For example, use TiDB as a test database by:
+
+```bash
+MYSQL_URI=mysql://root:password@tcp(127.0.0.1:4000)/ go test -v ./...
+```
+
+## Your First Contribution
+
+You can start by finding an existing issue with the [help wanted](https://github.com/zhenghaoz/gorse/issues?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22) label in the Gorse repository. These issues are well suited for new contributors. Issues can be claimed by publishing an `/assign` comment.
+
+### Contribution Workflow
+
+To contribute to the Gorse code base, please follow the workflow as defined in this section.
+
+- Fork the repository to your own Github account
+- Make commits and add test case if the change fixes a bug or adds new functionality.
+- Run tests and make sure all the tests are passed.
+- Push your changes to a topic branch in your fork of the repository.
+- Submit a pull request.
+
+This is a rough outline of what a contributor's workflow looks like. Thanks for your contributions!
+
+## Getting Help
+
+Join us in the [Discord](https://discord.gg/x6gAtNNkAE) and post your question in the `#developers` channel.
diff --git a/README.md b/README.md
index b7184ffe4..54749b6ef 100644
--- a/README.md
+++ b/README.md
@@ -46,11 +46,7 @@ In addition, the administrator can perform system monitoring, data import and ex
   <img src="https://contrib.rocks/image?repo=zhenghaoz/gorse" />
 </a>
 
-Any contribution is appreciated: report a bug, give advice or create a pull request. For new contributors:
-
-- Issues labeled ["help wanted"](https://github.com/zhenghaoz/gorse/issues?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22) is friendly to new contributors (claim one by publishing an `/assign` comment).
-- Setup develop environment based on [Chapter 4: Developer's Guide](https://docs.gorse.io/chapter_4.html).
-- Discuss with other developers on [Discord](https://discord.gg/x6gAtNNkAE).
+Any contribution is appreciated: report a bug, give advice or create a pull request. Read [CONTRIBUTING.md](CONTRIBUTING.md) for more information.
 
 ## Acknowledgments
 
diff --git a/server/bench_test.sh b/server/bench_test.sh
index 811b8c3da..f3e380079 100644
--- a/server/bench_test.sh
+++ b/server/bench_test.sh
@@ -33,6 +33,10 @@ case $CACHE_ARG in
   mongodb)
     export BENCH_CACHE_STORE='mongodb://root:password@127.0.0.1:27017/'
     ;;
+  *)
+    echo "Unknown database $1"
+    exit 1
+    ;;
 esac
 
 case $DATA_ARG in
@@ -48,6 +52,10 @@ case $DATA_ARG in
   mongodb)
     export BENCH_DATA_STORE='mongodb://root:password@127.0.0.1:27017/'
     ;;
+  *)
+    echo "Unknown database $1"
+    exit 1
+    ;;
 esac
 
 echo cache: "$CACHE_ARG"