Added the docker file for setting up the oppia-android enviornment on…

… docker

docker/Dockerfile

@@ -0,0 +1,66 @@
+# Use the official Ubuntu base image
+FROM ubuntu:latest
+
+# Set environment variables to avoid interactive prompts during package installations
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Update the package list, install required packages, and clean up to save space
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    wget \
+    curl \
+    gnupg \
+    software-properties-common \
+    build-essential \
+    git \
+    unzip \
+    apt-transport-https && \
+    rm -rf /var/lib/apt/lists/*
+
+# Install OpenJDK 11 and OpenJDK 17
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    openjdk-11-jdk \
+    openjdk-17-jdk && \
+    rm -rf /var/lib/apt/lists/*
+
+# Set environment variables for JDK 11 and JDK 17
+ENV JAVA_HOME_11=/usr/lib/jvm/java-11-openjdk-amd64
+ENV JAVA_HOME_17=/usr/lib/jvm/java-17-openjdk-amd64
+
+# Set default JAVA_HOME to JDK 11
+ENV JAVA_HOME=$JAVA_HOME_11
+ENV PATH=$JAVA_HOME/bin:$PATH
+
+# Provide commands to switch between JDK 11 and JDK 17
+RUN echo "export JAVA_HOME=\$JAVA_HOME_11 && export PATH=\$JAVA_HOME/bin:\$PATH" > /etc/profile.d/jdk11.sh && \
+    echo "export JAVA_HOME=\$JAVA_HOME_17 && export PATH=\$JAVA_HOME/bin:\$PATH" > /etc/profile.d/jdk17.sh && \
+    chmod +x /etc/profile.d/jdk11.sh /etc/profile.d/jdk17.sh
+
+# Install Bazel dependencies and GPG key
+RUN curl -fsSL https://bazel.build/bazel-release.pub.gpg | gpg --dearmor > /usr/share/keyrings/bazel-archive-keyring.gpg && \
+    echo "deb [arch=amd64 signed-by=/usr/share/keyrings/bazel-archive-keyring.gpg] https://storage.googleapis.com/bazel-apt stable jdk1.8" > /etc/apt/sources.list.d/bazel.list && \
+    apt-get update && apt-get install -y --no-install-recommends bazel && \
+    apt-get install -y --no-install-recommends bazel-6.5.0 && \
+    rm -rf /var/lib/apt/lists/*
+
+# Set up Android SDK directory and download command-line tools
+ENV ANDROID_HOME=/opt/android-sdk
+RUN mkdir -p $ANDROID_HOME/cmdline-tools && \
+    wget https://dl.google.com/android/repository/commandlinetools-linux-7302050_latest.zip -O /tmp/commandlinetools.zip && \
+    unzip /tmp/commandlinetools.zip -d $ANDROID_HOME/cmdline-tools && \
+    mv $ANDROID_HOME/cmdline-tools/cmdline-tools $ANDROID_HOME/cmdline-tools/tools && \
+    rm /tmp/commandlinetools.zip
+
+# Update environment variables for Android SDK
+ENV PATH=$ANDROID_HOME/cmdline-tools/tools/bin:$ANDROID_HOME/platform-tools:$PATH
+
+# Accept Android SDK licenses and install required components
+RUN yes | sdkmanager --licenses && \
+    sdkmanager --install "platform-tools" "platforms;android-34" "build-tools;32.0.0"
+
+# Configure Bazel for Linux
+RUN echo "build --enable_platform_specific_config" >> $HOME/.bazelrc && \
+    echo "build:linux --sandbox_tmpfs_path=/tmp" >> $HOME/.bazelrc
+
+
+# Default command to run when the container starts
+CMD ["bash"]