Update Dockerfile

Dockerfile

@@ -9,6 +9,15 @@ ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1
 
 ARG CODE_SERVER_VERSION=4.109.2
+ARG KOTLIN_VERSION=1.9.25
+ARG ANDROID_CMDLINE_TOOLS_VERSION=11076708
+ARG ANDROID_PLATFORM=34
+ARG ANDROID_BUILD_TOOLS=34.0.0
+
+ENV KOTLIN_HOME=/opt/kotlin
+ENV ANDROID_SDK_ROOT=/opt/android-sdk
+ENV ANDROID_HOME=/opt/android-sdk
+ENV PATH="${PATH}:${KOTLIN_HOME}/bin:${ANDROID_SDK_ROOT}/cmdline-tools/latest/bin:${ANDROID_SDK_ROOT}/platform-tools"
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ca-certificates curl git bash sudo tini jq procps unzip \
@@ -18,6 +27,10 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     # Java + Node
     openjdk-17-jdk-headless maven \
     nodejs npm \
+    # Databases
+    default-mysql-server default-mysql-client \
+    postgresql postgresql-client \
+    redis-server redis-tools \
     # Rust + Go
     rustc cargo rustfmt \
     golang-go \
@@ -28,6 +41,24 @@ RUN curl -fsSL "https://github.com/coder/code-server/releases/download/v${CODE_S
     && dpkg -i /tmp/code-server.deb \
     && rm -f /tmp/code-server.deb
 
+# Kotlin compiler
+RUN curl -fsSL "https://github.com/JetBrains/kotlin/releases/download/v${KOTLIN_VERSION}/kotlin-compiler-${KOTLIN_VERSION}.zip" -o /tmp/kotlin.zip \
+    && unzip -q /tmp/kotlin.zip -d /opt \
+    && mv /opt/kotlinc "${KOTLIN_HOME}" \
+    && ln -s "${KOTLIN_HOME}/bin/kotlin" /usr/local/bin/kotlin \
+    && ln -s "${KOTLIN_HOME}/bin/kotlinc" /usr/local/bin/kotlinc \
+    && rm -f /tmp/kotlin.zip
+
+# Android SDK command-line tools + common packages
+RUN mkdir -p "${ANDROID_SDK_ROOT}/cmdline-tools" \
+    && curl -fsSL "https://dl.google.com/android/repository/commandlinetools-linux-${ANDROID_CMDLINE_TOOLS_VERSION}_latest.zip" -o /tmp/android-tools.zip \
+    && unzip -q /tmp/android-tools.zip -d "${ANDROID_SDK_ROOT}/cmdline-tools" \
+    && mv "${ANDROID_SDK_ROOT}/cmdline-tools/cmdline-tools" "${ANDROID_SDK_ROOT}/cmdline-tools/latest" \
+    && rm -f /tmp/android-tools.zip \
+    && yes | "${ANDROID_SDK_ROOT}/cmdline-tools/latest/bin/sdkmanager" --sdk_root="${ANDROID_SDK_ROOT}" --licenses \
+    && "${ANDROID_SDK_ROOT}/cmdline-tools/latest/bin/sdkmanager" --sdk_root="${ANDROID_SDK_ROOT}" \
+      "platform-tools" "platforms;android-${ANDROID_PLATFORM}" "build-tools;${ANDROID_BUILD_TOOLS}"
+
 # Python core deps
 RUN pip install --no-cache-dir --upgrade pip setuptools wheel && \
     pip install --no-cache-dir \
@@ -45,7 +76,7 @@ RUN npm install -g @openai/codex && npm cache clean --force
 RUN useradd -m -u 1000 -s /bin/bash coder \
     && echo "coder ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers \
     && mkdir -p /home/coder/.config/code-server /home/coder/.codex \
-    && chown -R coder:coder /home/coder
+    && chown -R coder:coder /home/coder /opt/kotlin /opt/android-sdk
 
 # Quick C build check (build-time)
 RUN printf '#include <stdio.h>\nint main(){puts("ok");return 0;}\n' > /tmp/t.c \