bump go to 1.23 in base image

Dockerfile

@@ -1,27 +1,27 @@
 # base image for APK builds
-FROM ubuntu:latest
+FROM ubuntu:jammy
 
 RUN --mount=type=cache,target=/var/cache/apt apt-get update
 # make...python3 for tflite build
 # nasm for x264
 RUN --mount=type=cache,target=/var/cache/apt apt-get install -qy \
     zip \
     openjdk-21-jdk-headless \
-    make curl patch cmake git python3 \
+    make curl patch cmake git python3 wget \
     nasm
 
-ENV ANDROID_HOME /droid
-ENV ANDROID_SDK_ROOT /droid
+ENV ANDROID_HOME=/droid
+ENV ANDROID_SDK_ROOT=/droid
 
 WORKDIR ${ANDROID_SDK_ROOT}
 
 # https://developer.android.com/studio#command-line-tools-only
 ARG CLI_TOOLS=commandlinetools-linux-11076708_latest.zip
 RUN curl --fail --silent --show-error -o ${CLI_TOOLS} https://dl.google.com/android/repository/${CLI_TOOLS} && unzip -q ${CLI_TOOLS} && rm ${CLI_TOOLS}
 
-ENV PATH ${PATH}:/droid/cmdline-tools/bin
+ENV PATH=${PATH}:/droid/cmdline-tools/bin
 ARG NDK_VERSION=26.2.11394342
-ENV NDK_ROOT ${ANDROID_SDK_ROOT}/ndk/${NDK_VERSION}
+ENV NDK_ROOT=${ANDROID_SDK_ROOT}/ndk/${NDK_VERSION}
 
 # note: we target android 28, but compileSdk is 34 in our gradle files; check if both are needed
 # we're removing unused tools to shrink the image size
@@ -30,16 +30,23 @@ RUN yes | sdkmanager --sdk_root=$(realpath .) --install "platforms;android-28" "
     && rm -rf tools/lib/monitor* \
     && rm -rf ${NDK_ROOT}/toolchains/llvm/prebuilt/linux-x86_64/musl
 
-ENV SDKMAN_DIR /usr/local/sdkman
+ENV SDKMAN_DIR=/usr/local/sdkman
 # this is the sdk manager script from https://get.sdkman.io/
 # we have a copy checked-in to get a consistent version
 # todo: look at getting openjdk from here as well
 RUN --mount=type=bind,source=etc/get-sdkman.sh,target=get-sdkman.sh ./get-sdkman.sh
 # requires bash because it uses 'source' keyword internally
 RUN bash -c "source $SDKMAN_DIR/bin/sdkman-init.sh && sdk install gradle 8.2"
 
-# note: actions/setup-go fails at the jni step in a way I don't understand. apt getting for now.
-ENV PATH ${PATH}:/usr/lib/go-1.21/bin:/root/go/bin
-RUN --mount=type=cache,target=/var/cache/apt apt-get install -qy golang-1.21-go
+# note: actions/setup-go fails at the jni step in a way I don't understand. manually installing for now.
+ARG GO_VERSION=1.23.2
+RUN wget --quiet https://go.dev/dl/go${GO_VERSION}.linux-$(dpkg --print-architecture).tar.gz \
+	&& tar xf go*.linux-*.tar.gz -C /usr/local/lib \
+	&& mv /usr/local/lib/go /usr/local/lib/go-${GO_VERSION} \
+	&& rm go*.linux-*.tar.gz \
+	&& update-alternatives --install /usr/bin/go go /usr/local/lib/go-${GO_VERSION}/bin/go 10 \
+	    --slave /usr/bin/gofmt gofmt /usr/local/lib/go-${GO_VERSION}/bin/gofmt
+
 # todo: pin gomobile in rdk tools.go
+ENV PATH=${PATH}:/root/go/bin
 RUN go install golang.org/x/mobile/cmd/gomobile@latest && gomobile init