Update readme for docker-compose v2

Author: Nemo157

README.md

@@ -64,8 +64,7 @@ mkdir -p ignored/cratesfyi-prefix/crates.io-index
 # Builds the docs.rs binary
 cargo build
 # Start the external services.
-# It may be `docker compose` in newer versions
-docker-compose up -d db s3
+docker compose up -d db s3
 # anything that doesn't run via docker-compose needs the settings defined in
 # .env. Either via `. ./.env` as below, or via any dotenv shell integration.
 . ./.env
@@ -111,19 +110,26 @@ can take a look at its documentation [here](https://github.com/GuillaumeGomez/br
 
 ### Pure docker-compose
 
-If you have trouble with the above commands, consider using `docker-compose up --build`,
+If you have trouble with the above commands, consider using `docker compose up --build`,
 which uses docker-compose for the web server as well.
 This will not cache dependencies - in particular, you'll have to rebuild all 400 whenever the lockfile changes -
 but makes sure that you're in a known environment so you should have fewer problems getting started.
 
 You can also use the `web` container to run builds on systems which don't support running builds directly (mostly on Mac OS or Windows):
 ```sh
 # run a build for a single crate
-docker-compose run web build crate regex 1.3.1
+docker compose run web build crate regex 1.3.1
 # or build essential files
-docker-compose run web build add-essential-files
+docker compose run web build add-essential-files
 # rebuild the web container when you changed code.
-docker-compose build web
+docker compose up -d web --build
+```
+
+You can also run other commands like the setup above from within the container:
+
+```sh
+docker compose run --rm cli database migrate
+docker compose run --rm cli build update-toolchain
 ```
 
 Note that running tests is not supported when using pure docker-compose.
@@ -145,14 +151,14 @@ Three services are defined:
 
 #### Rebuilding Containers
 
-To rebuild the site, run `docker-compose build`.
+To rebuild the site, run `docker compose build`.
 Note that docker-compose caches the build even if you change the source code,
 so this will be necessary anytime you make changes.
 
 If you want to completely clean up the database, don't forget to remove the volumes too:
 
 ```sh
-$ docker-compose down --volumes
+$ docker compose down --volumes
 ```
 
 #### FAQ
@@ -166,7 +172,7 @@ This is probably because you have `git.autocrlf` set to true,
 
 ##### I see the error `/opt/rustwide/cargo-home/bin/cargo: cannot execute binary file: Exec format error` when running builds.
 
-You are most likely not on a Linux platform. Running builds directly is only supported on `x86_64-unknown-linux-gnu`. On other platforms you can use the `docker-compose run web build [...]` workaround described above.
+You are most likely not on a Linux platform. Running builds directly is only supported on `x86_64-unknown-linux-gnu`. On other platforms you can use the `docker compose run web build [...]` workaround described above.
 
 See [rustwide#41](https://github.com/rust-lang/rustwide/issues/41) for more details about supporting more platforms directly.
 
@@ -194,11 +200,11 @@ cargo run -- start-web-server
 ```sh
 # Builds <CRATE_NAME> <CRATE_VERSION> and adds it into database
 # This is the main command to build and add a documentation into docs.rs.
-# For example, `docker-compose run web build crate regex 1.1.6`
+# For example, `docker compose run web build crate regex 1.1.6`
 cargo run -- build crate <CRATE_NAME> <CRATE_VERSION>
 
 # alternatively, via the web container
-docker-compose run web build crate <CRATE_NAME> <CRATE_VERSION>
+docker compose run web build crate <CRATE_NAME> <CRATE_VERSION>
 
 # Builds every crate on crates.io and adds them into database
 # (beware: this may take months to finish)