docs: Complete installation doc

packages/docs/pages/guide/installation.md

@@ -1,44 +1,20 @@
 # Installation
 
-<!-- TODO: Add instructions to install PostgreSQL and specify supported node versions -->
+You can install Automatisch by using docker compose.
-
-Automatisch supports both npm and docker installation.
-
-### npm
-
-You can try Automatisch without installing by using [npx](https://docs.npmjs.com/cli/v8/commands/npx).
 
 ```bash
-npx automatisch
+# Clone the repository
+git clone git@github.com:automatisch/automatisch.git
+
+# Go to the repository folder
+cd automatisch/docker/compose
+
+# Start
+docker compose up
 ```
 
-Or you can install Automatisch globally via [npm](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm).
-
-```bash
-npm install automatisch -g
-```
-
-You need to run the start command after the installation.
-
-```bash
-automatisch start
-```
-
-### docker
-
-You can also use [docker](https://docs.docker.com/get-docker/) to install Automatisch.
-
-```bash
-docker run -it \
-	--name automatisch \
-	-p 3000:3000 \
-	automatisch start
-```
-
-<!-- TODO: Check requirements of https usage and revise the document accordingly -->
-
 ## Let's discover!
 
-✌️ That's it; you have Automatisch running. Let's check it out by browsing [http://localhost:3000](#)
+✌️ That's it; you have Automatisch running. Let's check it out by browsing `http://localhost:3000` You can use `user@automatisch.io` email address and `sample` password to login to Automatisch.
 
-If you see any problem while installing Automatisch, let us know via [github issues](#) or our [discord server](https://discord.gg/dJSah9CVrC).
+If you see any problems while installing Automatisch, let us know via [github issues](#) or our [discord server](https://discord.gg/dJSah9CVrC).