docs: Mention Postgres and Redis connection string formats

docs/self-hosting/configuration/envars.mdx

@@ -39,7 +39,7 @@ Used to configure platform-specific security and operational settings
 The platform utilizes Postgres to persist all of its data and Redis for caching and backgroud tasks
 
 <ParamField query="DB_CONNECTION_URI" type="string" default="" required>
-  Postgres database connection string.
+  Postgres database connection string. The format generally looks like this: `postgresql://username:password@host:5432/database`.
 </ParamField>
 
 <ParamField query="DB_ROOT_CERT" type="string" default="" optional>
@@ -49,7 +49,7 @@ The platform utilizes Postgres to persist all of its data and Redis for caching
 </ParamField>
 
 <ParamField query="REDIS_URL" type="string" default="none" required>
-  Redis connection string.
+  Redis connection string. The format generally looks like this: `redis://host:6379`.
 </ParamField>
 
 <ParamField query="DB_READ_REPLICAS" type="string" default="" optional>