Add Dockerfile and update devcontainer configuration for Yarn and features

Author: ericbusboom

.devcontainer/Dockerfile

@@ -0,0 +1,33 @@
+FROM mcr.microsoft.com/devcontainers/java:1-21-bullseye
+
+USER root
+
+# Import Yarn GPG key (try keys.openpgp.org first, fall back to yarn's pubkey)
+RUN set -eux \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends curl gnupg dirmngr ca-certificates apt-transport-https \
+    && mkdir -p /etc/apt/keyrings /tmp || true \
+    && (curl -fsSL "https://keys.openpgp.org/vks/v1/by-fingerprint/72ECF46A56B4AD39C907BBB71646B01B86E50310" -o /tmp/yarnkey || true) \
+    && if [ -s /tmp/yarnkey ]; then \
+         gpg --dearmor --yes -o /etc/apt/keyrings/yarn-archive-keyring.gpg /tmp/yarnkey; \
+       else \
+         curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --dearmor --yes -o /etc/apt/keyrings/yarn-archive-keyring.gpg; \
+       fi \
+    # If GPG verification fails in some environments, fall back to marking the repo trusted
+    && echo "deb [arch=$(dpkg --print-architecture) trusted=yes] https://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list \
+    && apt-get update \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/* /tmp/yarnkey
+FROM mcr.microsoft.com/devcontainers/java:1-21-bullseye
+
+# Ensure Yarn APT repo has its GPG key so later feature installs don't fail with NO_PUBKEY
+USER root
+RUN set -eux \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends curl gnupg dirmngr \
+    && curl -fsSL https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --dearmor -o /usr/share/keyrings/yarn-archive-keyring.gpg \
+    && echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/yarn-archive-keyring.gpg] https://dl.yarnpkg.com/debian/ stable main" \
+       > /etc/apt/sources.list.d/yarn.list \
+    && apt-get update \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*

.devcontainer/devcontainer-orig.json

@@ -0,0 +1,48 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/java
+{
+	"name": "Java",
+	"image": "ghcr.io/league-infrastructure/jtljava:latest",
+
+	"features": {
+		"ghcr.io/devcontainers/features/java:1": {
+			"version": "none",
+			"installMaven": "false",
+			"installGradle": "false"
+		},
+		"ghcr.io/devcontainers/features/desktop-lite:1": {
+			"password" : "code4life"
+		}
+	},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	"forwardPorts": [6080, 5901],
+
+	"portsAttributes": {
+	  "6080": {
+	    "label": "VNC_Web"
+	  },
+	  "5901": {
+	    "label": "VNC"
+	  }
+	},
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "java -version",
+	"postCreateCommand": "rm -rf .eclipse",
+
+	// Configure tool-specific properties.
+	"customizations": {
+		 "vscode": {
+      		"extensions": [
+      			"streetsidesoftware.code-spell-checker",
+      			"vscjava.vscode-java-pack",
+      			"Tobiah.language-pde"
+
+      		]
+    	}
+	}
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

.devcontainer/devcontainer.json

@@ -2,19 +2,26 @@
 // README at: https://github.com/devcontainers/templates/tree/main/src/java
 {
 	"name": "Java",
-	"image": "ghcr.io/league-infrastructure/jtljava:latest",
+	// Build from local Dockerfile so Yarn key is present before feature installs
+	"build": {
+		"dockerfile": "Dockerfile"
+	},
 
 	"features": {
 		"ghcr.io/devcontainers/features/java:1": {
 			"version": "none",
-			"installMaven": "false",
-			"installGradle": "false"
+			"installMaven": "true",
+			"installGradle": "true"
 		},
 		"ghcr.io/devcontainers/features/desktop-lite:1": {
-			"password" : "code4life"
+			"noVncVersion": "1.6.0",
+			"password": "code4life",
+			"webPort": "6080",
+			"vncPort": "5901"
 		}
 	},
 
+
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
 	"forwardPorts": [6080, 5901],
 
@@ -46,3 +53,4 @@
 	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
 	// "remoteUser": "root"
 }
+

.github/dependabot.yml

@@ -0,0 +1,12 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for more information:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+# https://containers.dev/guide/dependabot
+
+version: 2
+updates:
+ - package-ecosystem: "devcontainers"
+   directory: "/"
+   schedule:
+     interval: weekly