hacky, but might work

Author: danylo-safonov-solid

Dockerfile

@@ -1,3 +1,18 @@
-FROM dkrutskikh/dart_code_metrics_action:v3
+FROM dart:stable
+
+COPY action_app/ /action_app/
+
+RUN cd /action_app \
+    && dart pub get
+
+ENV PATH /flutter/bin:$PATH
+
+RUN apt-get update -y \
+    && apt-get install -y --no-install-recommends unzip \
+    && rm -rf /var/lib/apt/lists/*
+
+# Installing Flutter
+RUN git clone -b stable --depth 1 https://github.com/flutter/flutter.git /beta \
+    && flutter --version
 
 ENTRYPOINT ["dart", "run", "/action_app/bin/main.dart"]