Dockerfile

@@ -2,12 +2,18 @@ FROM google/dart:2.7
 
 WORKDIR /app
 
-RUN mkdir /pub-cache
+# Get Dart dependencies
+RUN mkdir -p /pub-cache
 ENV PUB_CACHE=/pub-cache
 ENV PATH="${PATH}:/pub-cache/bin"
 RUN pub global activate webdev
-
 ADD pubspec.* /app/
 RUN pub get
-ADD . /app/
 RUN pub get --offline
+
+RUN apt update && apt install ruby-sass ruby-dev build-essential -y
+RUN gem install sass-listen
+
+ADD . /app/
+
+CMD ["./start.sh"]

docker-compose.yml

@@ -4,8 +4,7 @@ services:
   web:
     build: .
     ports:
-      - "8010:8010"
-    command: webdev serve --release web:8010 --hostname 0.0.0.0
+      - "8010:8080"
     restart: always
     volumes:
       - ./web/:/app/web/

start.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+sass --watch web/style/:web/style -tcompressed &
+webdev serve --release --hostname 0.0.0.0