Add jimdo detection

This should close #1347

This can be tested on [this]( https://www.labobineapois.com/) website,
or on the [official examples](https://de.jimdo.com/beispiele/).

src/apps.json

@@ -3764,6 +3764,18 @@
 			"implies": "Java",
 			"website": "www.eclipse.org/jetty"
 		},
+		"Jimdo": {
+			"cats": [
+				1
+			],
+			"headers": {
+				"X-Jimdo-Instance": "",
+				"X-Jimdo-Wid": ""
+			},
+			"env": "^jimdo_(?:Data|Gen\\d+)$",
+			"icon": "jimdo.png",
+			"website": "www.jimdo.com/"
+		},
 		"Jirafe": {
 			"cats": [
 				10,