Add Nextflow and Docker support for Codespace

.devcontainer/Dockerfile

@@ -0,0 +1,21 @@
+# Use an official Ubuntu as a parent image
+FROM ubuntu:20.04
+
+# Install Java 11 (required for Nextflow)
+RUN apt-get update && apt-get install -y \
+  openjdk-11-jdk \
+  curl \
+  gnupg2 \
+  lsb-release \
+  software-properties-common
+
+# Install Docker dependencies (optional, if not using features)
+RUN apt-get update && apt-get install -y \
+  docker.io \
+  docker-compose
+
+# Set JAVA_HOME environment variable
+ENV JAVA_HOME /usr/lib/jvm/java-11-openjdk-amd64
+
+# Expose Docker socket
+RUN groupadd docker && usermod -aG docker $USER

.devcontainer/devcontainer.json

@@ -0,0 +1,21 @@
+{
+  "name": "Nextflow Development Environment",
+  "image": "mcr.microsoft.com/devcontainers/base:ubuntu",  // Base Ubuntu container image
+  "runArgs": [
+    "--cap-add=SYS_ADMIN",  // Ensure Docker CLI access
+    "--security-opt", 
+    "seccomp=unconfined"    // Unconfine security for Docker in Codespace
+  ],
+  "features": {
+    "docker-in-docker": "true"  // Enable Docker within Codespace
+  },
+  "postCreateCommand": "curl -s https://get.nextflow.io | bash && chmod +x nextflow && sudo mv nextflow /usr/local/bin/",
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "ms-azuretools.vscode-docker" // Docker extension for VS Code
+      ]
+    }
+  }
+}
+