Fix Docker setup in Codespace

.devcontainer/devcontainer.json

@@ -2,10 +2,11 @@
   "name": "Nextflow Development Environment",
   "image": "mcr.microsoft.com/devcontainers/base:ubuntu",  // Added Base Ubuntu container image as OS
   "runArgs": [
-    "--volume=/var/run/docker.sock:/var/run/docker.sock"  // Mount the Docker socket from host machine
+    "--volume=/var/run/docker.sock:/var/run/docker.sock"  // Mounted the Docker socket from host machine
   ],
-  "postCreateCommand": "sudo apt-get update && sudo apt-get install -y openjdk-11-jdk curl && curl -s https://get.nextflow.io | bash && chmod +x nextflow && sudo mv nextflow /usr/local/bin/", 
+  "postCreateCommand": "sudo apt-get update && sudo apt-get install -y openjdk-11-jdk curl && curl -s https://get.nextflow.io | bash && chmod +x nextflow && sudo mv nextflow /usr/local/bin/ && sudo apt-get install -y docker.io && sudo usermod -aG docker $USER", 
   // Updated packages, installed java 11, nextflow, changed permissions for nextflow to make it executable and moved it to /usr/local/bin
+  // Also installed Docker and added the Codespace user to the Docker group, enabling the user to run Docker commands without needing sudo
   "customizations": {
     "vscode": { // Added VSCode as my Editor
       "extensions": [