add docker file

.devcontainer/Dockerfile

@@ -0,0 +1,25 @@
+# Use a base image with Ubuntu
+FROM mcr.microsoft.com/vscode/devcontainers/base:ubuntu
+
+# Install Java 8, curl, and Python (required for Google Cloud SDK)
+RUN apt-get update && \
+    apt-get install -y openjdk-8-jdk curl python3 python3-pip && \
+    apt-get clean;
+
+# Set JAVA_HOME for Java 8
+ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64
+ENV PATH $JAVA_HOME/bin:$PATH
+
+# Install Google Cloud SDK
+RUN curl -sSL https://sdk.cloud.google.com | bash && \
+    /root/google-cloud-sdk/install.sh && \
+    /root/google-cloud-sdk/bin/gcloud components install beta
+
+# Add gcloud to PATH
+ENV PATH $PATH:/root/google-cloud-sdk/bin
+
+# Optional: Verify installations
+RUN java -version && gcloud --version
+
+# Set default shell to bash
+SHELL ["/bin/bash", "-c"]

.devcontainer/devcontainer.json

@@ -0,0 +1,15 @@
+{
+    "name": "Java 8 and Google Cloud SDK",
+    "build": {
+      "dockerfile": "Dockerfile"
+    },
+    "settings": {
+      "java.home": "/usr/lib/jvm/java-8-openjdk-amd64"
+    },
+    "extensions": [
+      "vscjava.vscode-java-pack", // Java support
+      "ms-azuretools.vscode-docker" // Docker support
+    ],
+    "postCreateCommand": "gcloud --version" // Verifies gcloud is installed
+  }
+