diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index 91b9197..16e747f 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -71,6 +71,7 @@ jobs:
         if: steps.check_image.outputs.exists == 'false'
         run: |
           docker buildx build \
+            --platform linux/amd64,linux/arm64 \
             --build-arg FLUTTER_VERSION=${{ env.FLUTTER_VERSION }} \
             --provenance=true \
             --sbom=true \
diff --git a/Dockerfile b/Dockerfile
index c05b2cf..7446d84 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,6 +13,8 @@ RUN apt-get install -y \
           libgtk-3-dev liblzma-dev \
           libstdc++-12-dev
 
+RUN apt-get clean && rm -rf /var/lib/apt/lists/*
+
 ENV FLUTTER_HOME=/opt/flutter
 ENV PATH="$FLUTTER_HOME/bin:$PATH"
 
@@ -24,6 +26,12 @@ RUN git config --global --add safe.directory /opt/flutter
 
 RUN flutter --version
 
+RUN rm -rf $FLUTTER_HOME/.pub-cache \
+           $FLUTTER_HOME/examples \
+           $FLUTTER_HOME/dev \
+           $FLUTTER_HOME/.git \
+           $FLUTTER_HOME/packages/flutter_tools/test
+
 WORKDIR /workspace
 
 CMD [ "bash" ]