docs: update README with some useful content

README.md

@@ -1,10 +1,163 @@
-# clompse - Take a Glimpse at Your Cloud
+<h1 align="center">
+    <div>
+        <img alt="clompse" width="320" src="https://github.com/vst/clompse/assets/374793/089a65db-0cc1-49ba-ac8a-62b743910ead" />
+    </div>
+    <sub>Take a Glimpse at Your Cloud</sub>
+    <p></p>
+    <div>
+        <img alt="GitHub Release" src="https://img.shields.io/github/v/release/vst/clompse?display_name=tag&style=for-the-badge">
+        <img alt="GitHub Issues or Pull Requests" src="https://img.shields.io/github/issues/vst/clompse?style=for-the-badge">
+        <img alt="GitHub Issues or Pull Requests" src="https://img.shields.io/github/issues-pr/vst/clompse?style=for-the-badge">
+    </div>
+</h1>
 
-> **TODO** Provide minimum viable documentation.
+> [!WARNING]
+>
+> This is an experimental project that is in its early stages of
+> development. Both the functionality and API are subject to change at
+> any time.
+>
+> It is not recommended to use this in production or any other
+> critical environment. Use at your own risk.
+
+**clompse** is a command-line tool designed to provide a unified
+interface to various cloud providers, helping you manage a registry of
+your cloud resources.
+
+It consumes a JSON/YAML formatted configuration file that lists
+various profiles where each contains a number of cloud provider API
+credentials. It then allows you to query and list cloud resources
+across these providers. The output can be displayed in tabular format
+on the console or exported to a file in CSV or JSON format.
+
+Currently, it supports listing cloud servers with their firewall
+configurations, object storage buckets, DNS zones, and records for the
+following cloud service providers:
+
+1. Amazon Web Services
+2. DigitalOcean
+3. Hetzner
+
+## Motivation
+
+Using cloud services has become common for many individuals and
+organizations. As the number of cloud resources grows, it becomes
+increasingly difficult to keep track of them. This tool aims to
+provide a unified interface to query and list commonly-used cloud
+resources across different cloud providers.
+
+While there are many tools and SaaS solutions that offer similar or
+more advanced functionality, they are often too complex, too
+complicated, or too expensive for individual hackers. This tool is a
+more humble alternative to such solutions.
+
+## Non-Motivation
+
+This tool is not intended to be a full-fledged cloud management
+tool. It is not a replacement for the cloud providers' own management
+consoles or APIs.
+
+It also does not provide functionality to create, update, or delete
+cloud resources, nor is such functionality planned: it is a read-only
+interface to cloud resources.
+
+## Challenge
+
+Not all cloud providers offer APIs that list resources as conveniently
+as others. Additionally, the exposed properties of similar resources
+may differ between providers.
+
+To address this, the tool defines common data types for cloud
+resources and maps cloud provider-specific data types to these common
+types. It is not always possible to map all properties of a cloud
+resource to a common data type. In such cases, the tool will assume
+some (hopefully) reasonable defaults or omit such properties
+altogether.
+
+## Installation
+
+Download and install the statically compiled binary for Linux
+(x86_64):
+
+```sh
+curl -Lo /tmp/clompse https://github.com/vst/clompse/releases/latest/download/clompse-static-linux-x86_64
+sudo install -m 755 /tmp/clompse /usr/local/bin/clompse
+```
+
+Or install it into your `nix` profile (replace `<VERSION>` with the
+latest version):
+
+```sh
+nix profile install --file https://github.com/vst/hostpatrol/archive/v<VERSION>.tar.gz app
+```
+
+## Configuration
+
+Here is an example configuration file:
+
+```yaml
+# yaml-language-server: $schema=https://raw.githubusercontent.com/vst/clompse/main/config_schema.json
+
+name: "Example Configuration"
+
+cloud_profiles:
+  - name: "Personal"
+    connections:
+      - type: "aws"
+        value:
+          access_key_id: "AKIAIOSFODNN7EXAMPLE"
+          secret_access_key: "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
+  - name: "Work - Internal"
+    connections:
+      - type: "aws"
+        value:
+          access_key_id: "AKIAIOSFODH7EXAMPLE"
+          secret_access_key: "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
+  - name: "Work - Client"
+    connections:
+      - type: "do"
+        value:
+          token: "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
+          spaces_access_key_id: "AKIAIOSFODNN7EXAMPLE"
+          spaces_secret_access_key: "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
+      - type: "hetzner"
+        value:
+          token: "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
+      - type: "hetzner"
+        value:
+          token: "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
+          token_dns: "0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef"
+```
+
+## Usage
+
+Command-line parameters should be self-explanatory:
+
+```console
+$ clompse --help
+clompse - Rainwater Harvesting vX.Y.Z
+
+Usage: clompse (config | server | storage | domains | version) [-v|--version]
+
+  Top Level Commands
+
+Available options:
+  -v,--version             Show application version and exit
+  -h,--help                Show this help text
+
+Available commands:
+  config                   Configuration commands.
+  server                   Server commands.
+  storage                  Storage commands.
+  domains                  DNS commands.
+  version                  Show version and build information.
+
+See <https://github.com/vst/clompse> for help and feedback.
+```
 
 ## Development
 
-Provision Nix Shell via `direnv`:
+Provision Nix shell via `direnv`:
 
 ```sh
 direnv allow
@@ -24,3 +177,12 @@ hpack &&
     cabal v1-test &&
     cabal haddock -O0
 ```
+
+## License
+
+Copyright &copy; 2024 Vehbi Sinan Tunalioglu. This work is licensed
+under [MIT License].
+
+<!-- REFERENCES -->
+
+[MIT License]: https://opensource.org/license/mit