Update devcontainer.json

Author: julian-siebert

.devcontainer/devcontainer.json

@@ -1,20 +1,21 @@
 {
   "name": "Remora Gradle plugin",
-  "image": "mcr.microsoft.com/devcontainers/java:1-21-bullseye",
+  "image": "ubuntu:latest",
+  "customizations" : {
+    "jetbrains" : {
+      "backend" : "IntelliJ"
+    }
+  },
   "features": {
+    "ghcr.io/devcontainers/features/git" : {},
+    "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {},
     "ghcr.io/devcontainers/features/java:1": {
-      "version": "none",
-      "installMaven": "true",
+      "version": "21.0.7",
       "installGradle": "true"
-    },
-    "ghcr.io/dhoeric/features/act:1": {},
-    "ghcr.io/audacioustux/devcontainers/graalvm:1": {
-      "java": "21"
     }
   },
-  "customizations" : {
-    "jetbrains" : {
-      "backend" : "IntelliJ"
-    }
-  }
+  "runArgs": [
+    "--add-host=host.docker.internal:host-gateway"
+  ],
+  "remoteUser": "ubuntu"
 }