Added description and usage instructions to the readme

README.md

@@ -1,18 +1,42 @@
 # signalblast
 
-* Get the docker image from docker hub
+Signalblast is a tool to send encrypted messages anonymously over [Signal](https://www.signal.org/) to a subscriber list. The sender does not know who the subscribers in the list are, nor the subscribers know who the sender is.
+
+A server is required to host the bot, find instructions on how the set it up below.
+
+The idea for this bot came from [Signalboost](https://web.archive.org/web/https://signalboost.info/), which unfortunately is no longer alive.
+
+## Usage
+
+Once the server is up and running, several commands are available:
+* `!subscribe` send this to sign up to the list
+* `!broadcast` after subscribing any message preceded by this will be broadcasted to every subscriber
+* `!unsubscribe` to stop receiving messages
+* `!help` to be reminded of which commands are available
+* `!admin` send a message only to the list admin, useful for getting technical support
+
+## Installation
+
+The only required dependency is [docker](https://www.docker.com/).
+
+* Once docker is installed, get the signalblast image from docker hub
+  * ```bash
+    docker pull eraxama/signalblast
+    ```
 * Run a container that uses the image
   * ```bash
-    ./docker/run_container.sh
+       docker container run \
+       --restart=unless-stopped \
+       -v "./data/signalblast:/root/signalblast/signalblast/data" \
+       -v "./data/signald:/root/.config/signald" \
+       signalblast:latest <admin password> <expiration time>
     ```
-  * Optionally set the admin password and the expiration time, if only one argument is provided it is assumed to be the password.
-    * ```bash
-      ./docker/run_container.sh <password> <expiration time>
-      ```
+  * The admin password and the expiration time (in seconds) parameters are optional. If only one argument is provided it is assumed to be the password.
 * Open a second terminal inside the container to configure the bot
   * ```bash
     docker exec -it <container name> bash
     ```
+  * If you don't know the name of the container, run `docker container list` to find out.
 * Add the bot phone number to the config file
   * Replace `123456789` with your bot phone number, including the country code
   * ```bash
@@ -22,12 +46,12 @@
     source /root/signalblast/signalblast/data/phone_number.sh
     ```
 * Link **or** register the phone number
-  * Linking (recommended)
+  * Linking (easier)
     * Run the link command and scan the QR code
       * ```bash
         signaldctl account link $"SIGNAL_PHONE_NUMBER"
         ```
-  * Registering (not recommended)
+  * Registering (harder)
     * Get the captcha helper from here https://gitlab.com/signald/captcha-helper
       * Run captcha helper ```bash
                            ./signal-captcha-helper
@@ -40,5 +64,5 @@
       * ```bash
         signaldctl account verify $"SIGNAL_PHONE_NUMBER" nnnnn
         ```
-* Send message to the bot, a good first message is `!help`. The bot should reply inmediately.
-* If this is not the case, check the logs at `/var/log/signalblast/log`
+* Send message to the bot, a good first message is `!help`. The bot should reply immediately.
+* If this is not the case, check the logs at `/var/log/signalblast.log`