[chore] update default http client timeout to 30s (#3214)

example/config.yaml

@@ -933,9 +933,9 @@ http-client:
   # Duration. Timeout to use for outgoing HTTP requests. If the timeout
   # is exceeded, the connection to the remote server will be dropped.
   # A value of 0s indicates no timeout: this is not advised!
-  # Examples: ["5s", "10s", "0s"]
-  # Default: "10s"
-  timeout: "10s"
+  # Examples: ["5s", "30s", "0s"]
+  # Default: "30s"
+  timeout: "30s"
 
   ########################################
   #### RESERVED IP RANGE EXCEPTIONS ######

internal/config/defaults.go

@@ -213,7 +213,7 @@ var Defaults = Configuration{
 	HTTPClient: HTTPClientConfiguration{
 		AllowIPs:              make([]string, 0),
 		BlockIPs:              make([]string, 0),
-		Timeout:               10 * time.Second,
+		Timeout:               30 * time.Second,
 		TLSInsecureSkipVerify: false,
 	},
 

test/envparsing.sh

@@ -96,7 +96,7 @@ EXPECT=$(cat << "EOF"
     "http-client": {
         "allow-ips": [],
         "block-ips": [],
-        "timeout": 10000000000,
+        "timeout": 30000000000,
         "tls-insecure-skip-verify": false
     },
     "instance-deliver-to-shared-inboxes": false,