Some polish for README, cargo fixes

Author: peterix

.env.example

@@ -1,5 +1,5 @@
 # See https://docs.rs/env_logger
-RUST_LOG=info
+RUST_LOG=error
 
 DISCORD_TOKEN=
 BACKGROUND_CAT_PREFIX=-

Cargo.toml

@@ -4,3 +4,6 @@ members = [
     "apps/discord-cat",
     "libs/background-cat",
 ]
+
+[profile.release]
+lto = true

README.md

@@ -4,3 +4,32 @@
 I made this bot because it was brought to my attention that other discords also had similar bots. Dissatisfied with the other ones, I made yet another one.
 
 [![xkcd "Standards" comic](https://imgs.xkcd.com/comics/standards.png)](https://xkcd.com/927/)
+
+## Development
+
+- Build the code: `cargo build --bin discord-cat`
+- Copy `.env.example` to `target/debug/`
+- Customize `target/debug/.env` and include your Discord token in it, like this:
+   ```
+   # See https://docs.rs/env_logger
+   RUST_LOG=error
+
+   DISCORD_TOKEN=AAa0AAa0AAAaAaa...
+   BACKGROUND_CAT_PREFIX=-
+   ```
+- Run the bot: `cargo run -p discord-cat`
+
+## Running in production
+
+- Copy `.env.example` to `.env`
+- Customize `.env` and include your Discord token in it, like this:
+   ```
+   # See https://docs.rs/env_logger
+   RUST_LOG=error
+
+   DISCORD_TOKEN=AAa0AAa0AAAaAaa...
+   BACKGROUND_CAT_PREFIX=-
+   ```
+
+- Build the images: `docker-compose build`
+- Start the service: `docker-compose start`

libs/background-cat/Cargo.toml

@@ -11,6 +11,3 @@ lazy_static = "1.4.0"
 log = { version = "0.4.16", features = ["release_max_level_info"] }
 env_logger = "0.9.0"
 indoc = "1.0.6"
-
-[profile.release]
-lto = true