Make the config structure a little clearer & easier to use

config.js

@@ -10,25 +10,20 @@
  *
  *************************************************************************************************/
 
-// Local testing certificate for now
+// Put your CA certificate data here in PEM format:
 const CERT_PEM = `-----BEGIN CERTIFICATE-----
 
 [!! Put your CA certificate data here, in PEM format !!]
 
 -----END CERTIFICATE-----`;
 
-if (CERT_PEM.includes("Put your CA certificate data here")) {
-    throw new Error('No certificate was provided' +
-        '\n\n' +
-        'You need to set CERT_PEM in the Frica config script ' +
-        'to the contents of your CA certificate.'
-    );
-}
-
-// Default emulator address for now:
+// Put your intercepting proxy's address here:
 const PROXY_HOST = '127.0.0.1';
 const PROXY_PORT = 8000;
 
+// If you like, set to to true to enable extra logging:
+const DEBUG_MODE = false;
+
 // If you find issues with non-HTTP traffic being captured (due to the
 // native connect hook script) you can add ports here to exempt traffic
 // on that port from being redirected. Note that this will only affect
@@ -37,8 +32,12 @@ const PROXY_PORT = 8000;
 // sent via the proxy and intercepted despite this setting.
 const IGNORED_NON_HTTP_PORTS = [];
 
-// Set to enable extra logging:
-const DEBUG_MODE = false;
+
+// ----------------------------------------------------------------------------
+// You don't need to modify any of the below, it just checks and applies some
+// of the configuration that you've entered above.
+// ----------------------------------------------------------------------------
+
 
 if (DEBUG_MODE) {
     // Add logging just for clean output & to separate reloads:
@@ -50,4 +49,14 @@ if (DEBUG_MODE) {
     });
 } else {
     console.log(''); // Add just a single newline, for minimal clarity
+}
+
+// Check the certificate (without literally including the instruction phrasing
+// here, as that can be confusing for some users):
+if (CERT_PEM.match(/\[!!.* CA certificate data .* !!\]/)) {
+    throw new Error('No certificate was provided' +
+        '\n\n' +
+        'You need to set CERT_PEM in the Frica config script ' +
+        'to the contents of your CA certificate.'
+    );
 }