diff --git a/Cargo.lock b/Cargo.lock
index 00337a8..3c7749f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -419,7 +419,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9fc0510504f03c51ada170672ac806f1f105a88aa97a5281117e1ddc3368e51a"
 
 [[package]]
-name = "fishctl"
+name = "firefish-cli"
 version = "0.1.0-alpha.1"
 dependencies = [
  "clap",
diff --git a/Cargo.toml b/Cargo.toml
index d0de845..cb52530 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,10 +1,14 @@
 [package]
-name = "fishctl"
+name = "firefish-cli"
 version = "0.1.0-alpha.1"
 rust-version = "1.74"
 edition = "2021"
 license = "MIT"
 
+[[bin]]
+name = "fishctl"
+path = "src/main.rs"
+
 [dependencies]
 clap = { version = "4.5", features = ["derive"] }
 color-print = "0.3"
diff --git a/Containerfile b/Containerfile
index 6014b15..b9b3cb3 100644
--- a/Containerfile
+++ b/Containerfile
@@ -7,3 +7,4 @@ RUN cargo install --locked --path .
 FROM docker.io/busybox:musl
 COPY LICENSE ./
 COPY --from=builder /usr/local/cargo/bin/fishctl /usr/local/bin/fishctl
+WORKDIR /firefish
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e3d3fbb
--- /dev/null
+++ b/README.md
@@ -0,0 +1,88 @@
+# Firefish CLI tool
+
+## Install and Update
+
+### Install pre-built executable using [cargo-binstall](https://github.com/cargo-bins/cargo-binstall)
+
+```sh
+# If you don't have cargo-binstall, install it first
+# curl -L --proto '=https' --tlsv1.2 -sSf https://raw.githubusercontent.com/cargo-bins/cargo-binstall/main/install-from-binstall-release.sh | bash
+
+# Install pre-built executable
+cargo binstall --locked --git https://firefish.dev/firefish-cli.git
+```
+
+You can update the package using the same command.
+
+```sh
+cargo binstall --locked --git https://firefish.dev/firefish-cli.git
+```
+
+### Install from source
+
+```sh
+# Build from source
+cargo install --locked --git https://firefish.dev/firefish-cli.git
+```
+
+You can update the package using the same command.
+
+```sh
+cargo install --locked --git https://firefish.dev/firefish-cli.git
+```
+
+### Use pre-built OCI image
+
+You can also use `registry.firefish.dev/firefish-cli` container image.
+
+Please replace `fishctl ___` commands with
+
+```sh
+docker run -it --rm --volume "$(pwd)":/firefish \
+  registry.firefish.dev/firefish-cli \
+  fishctl ___
+
+# or
+
+podman run -it --rm --volume "$(pwd)":/firefish \
+  registry.firefish.dev/firefish-cli \
+  fishctl ___
+```
+
+to run it inside a container.
+
+If you are using a container network (which is typically the case if you using `docker-compose.yml` to run Firefish), you also have to specify the network name like this:
+
+```sh
+docker run -it --rm --network network_name --volume "$(pwd)":/firefish \
+  registry.firefish.dev/firefish-cli \
+  fishctl ___
+
+# or
+
+podman run -it --rm --network network_name --volume "$(pwd)":/firefish \
+  registry.firefish.dev/firefish-cli \
+  fishctl ___
+```
+
+You can search for your network name by `docker network ls` or `podman network ls`.
+
+## Usage
+
+Please make sure to `cd` to the Firefish local repository before running these commands.
+
+### Migrate the config files
+
+[The admin note](https://firefish.dev/firefish/firefish/-/blob/main/docs/notice-for-admins.md) may tell you that you need to update the config files. In such a case, please execute the following command.
+
+```sh
+fishctl config migrate <revision>
+```
+
+### Validate the config files
+
+To validate the config files, run the following command. Note that this only performs a formal validation and does not check that the settings are appropriate. For example, this command does not check if the database password is correct.
+
+```sh
+fishctl config validate
+```