node container permissions fixes

src/docker-compose.yml

@@ -85,6 +85,7 @@ services:
     volumes:
       - .:/app
     working_dir: /app
+    entrypoint: /app/node_entrypoint.sh
     stdin_open: true
     tty: true
     command: ./run_node_watch.sh

src/node.Dockerfile

@@ -1,9 +1,13 @@
 FROM docker.io/cimg/node:current-browsers
 WORKDIR /app
 
+# Install gosu
+USER root
+RUN apt-get update && \
+    apt-get install -y gosu && \
+    rm -rf /var/lib/apt/lists/*
+
 # Install app dependencies
 # A wildcard is used to ensure both package.json AND package-lock.json are copied
 # where available (npm@5+)
 COPY --chown=circleci:circleci package*.json ./
-
-RUN npm install

src/node_entrypoint.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+# Get UID and GID of the /app directory owner
+HOST_UID=$(stat -c '%u' /app)
+HOST_GID=$(stat -c '%g' /app)
+
+# Update circleci user's UID and GID to match the host
+echo "Updating circleci user and group to match host UID:GID ($HOST_UID:$HOST_GID)"
+sudo groupmod -g "$HOST_GID" circleci
+sudo usermod -u "$HOST_UID" circleci
+
+exec gosu circleci "$@"