add .devcontainer

Author: joeferner

.devcontainer/Dockerfile

@@ -0,0 +1,4 @@
+FROM mcr.microsoft.com/devcontainers/javascript-node:22
+
+RUN apt-get update
+RUN apt-get install -y openjdk-17-jdk

.devcontainer/devcontainer.json

@@ -0,0 +1,16 @@
+{
+  "build": {
+    "dockerfile": "Dockerfile"
+  },
+  "runArgs": [],
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "streetsidesoftware.code-spell-checker",
+        "bierner.markdown-emoji",
+        "smulyono.reveal",
+        "ms-azuretools.vscode-docker"
+      ]
+    }
+  }
+}

.gitattributes

@@ -7,3 +7,5 @@
 *.jpg -text
 *.jpeg -text
 *.ico -text
+*.jar -text
+*.class -text