Support imgur alternatives

- Imgin (only one instance)
  - https://git.voidnet.tech/kev/imgin/
- Rimgo
  - https://codeberg.org/video-prize-ranch/rimgo

Closes #11

services.json

@@ -183,6 +183,26 @@
       "https://lingva.pussthecat.org"
     ]
   },
+  {
+    "type": "rimgo",
+    "test_url": "/a/H8M4rcp",
+    "fallback": "https://i.bcow.xyz",
+    "instances": [
+      "https://i.bcow.xyz",
+      "https://rimgo.pussthecat.org",
+      "https://img.riverside.rocks",
+      "https://rimgo.totaldarkness.net",
+      "https://rimgo.bus-hit.me"
+    ]
+  },
+  {
+      "type": "imgin",
+      "test_url": "/a/H8M4rcp",
+      "fallback": "https://imgin.voidtech.net",
+      "instances": [
+        "https://imgin.voidnet.tech"
+      ]
+  },
   {
     "type": "whoogle",
     "test_url": "/search?cookies_disabled=1&q=<%=query%>",