Add default clients (#105)

* Add the possibility to create client enabled by default when creating new accounts
* Can mark clients are granted for all users, regardless of users accounts grants

Reviewed-on: #105

README.md

@@ -16,6 +16,10 @@ You can configure a list of clients (Relying Parties) in a `clients.yaml` file w
   description: Git with a cup of tea
   secret: TOP_SECRET
   redirect_uri: https://mygit.mywebsite.com/
+  # If you want new accounts to be granted access to this client by default
+  default: true
+  # If you want the client to be granted to every users, regardless their account configuration
+  granted_to_all_users: true
 ```
 
 On the first run, BasicOIDC will create a new administrator with credentials `admin` / `admin`. On first login you will have to change these default credentials.
@@ -38,5 +42,27 @@ You will need the Rust toolchain to compile this project. To build it for produc
 cargo build --release
 ```
 
+## Testing with OAauth proxy
+If you want to test the solution with OAuth proxy, you can try to adapt the following commands (considering `192.168.2.103` is your local IP address):
+
+```bash
+# In a shell, start BasicOID
+RUST_LOG=debug cargo run -- -s storage -w "http://192.168.2.103.nip.io:8000"
+
+# In another shell, run OAuth proxy
+docker run --rm -p 4180:4180 quay.io/oauth2-proxy/oauth2-proxy:latest --provider=oidc --email-domain=* --client-id=oauthproxy --client-secret=secretoauth --cookie-secret=SECRETCOOKIE1234 --oidc-issuer-url=http://192.168.2.103.nip.io:8000 --http-address 0.0.0.0:4180  --upstream http://192.168.2.103 --redirect-url http://192.168.2.103:4180/oauth2/callback --cookie-secure=false
+```
+
+Corresponding client configuration:
+```yaml
+- id: oauthproxy
+  name: Oauth proxy
+  description: oauth proxy
+  secret: secretoauth
+  redirect_uri: http://192.168.2.103:4180/
+```
+
+> Note: We do need to use real domain name instead of IP address due to the `webauthn-rs` crate limitations. We therefore use the `nip.io` domain helper.
+
 ## Contributing
 If you wish to contribute to this software, feel free to send an email to contact@communiquons.org to get an account on my system, managed by BasicOIDC :)