https: Add example configuration file

Signed-off-by: Julien Pivotto <roidelapluie@inuits.eu>

docs/configuration/https.md

@@ -20,6 +20,8 @@ Generic placeholders are defined as follows:
 * `<secret>`: a regular string that is a secret, such as a password
 * `<string>`: a regular string
 
+A valid example file can be found [here](/documentation/examples/web-config.yml).
+
 ```
 tls_server_config:
   # Certificate and key files for server to use to authenticate to client.

documentation/examples/web-config.yml

@@ -0,0 +1,12 @@
+# TLS and basic authentication configuration example.
+#
+# Additionally, a certificate and a key file are needed.
+tls_server_config:
+  cert_file: server.crt
+  key_file: server.key
+
+# Usernames and passwords required to connect to Prometheus.
+# Passwords are hashed with bcrypt: https://github.com/prometheus/exporter-toolkit/blob/master/https/README.md#about-bcrypt
+basic_auth_users:
+  alice: $2y$10$mDwo.lAisC94iLAyP81MCesa29IzH37oigHC/42V2pdJlUprsJPze
+  bob: $2y$10$hLqFl9jSjoAAy95Z/zw8Ye8wkdMBM8c5Bn1ptYqP/AXyV0.oy0S8m