Run build as non-root user in docker

Author: Nisarg Jhaveri

Dockerfile

@@ -11,7 +11,14 @@ RUN apt-get -q -y install file wget cpio rsync locales \
 RUN apt-get -q -y autoremove && apt-get -q -y clean
 RUN update-locale LC_ALL=C
 
+RUN useradd -ms /bin/bash buildroot
+
+RUN mkdir -p /app/buildroot/dl && chown -R buildroot:buildroot /app/buildroot/dl
+RUN mkdir -p /app/buildroot/output && chown -R buildroot:buildroot /app/buildroot/output
+
 VOLUME /app/buildroot/dl
 VOLUME /app/buildroot/output
 
+USER buildroot
+
 CMD /bin/bash

docker-compose.yml

@@ -1,5 +1,3 @@
-version: '3.7'
-
 services:
   bash: &base
     build: .
@@ -10,11 +8,11 @@ services:
       - output:/app/buildroot/output
     working_dir: /app/buildroot
     command: bash
-  
+
   generate_image_donotuse: &generate_image
     <<: *base
     command: bash -x -c "make BR2_EXTERNAL=../aa_wireless_dongle/ O=output/$${BOARD_NAME} $${BOARD_NAME}_defconfig && cd output/$${BOARD_NAME} && make && mkdir -p /app/images/ && cp images/sdcard.img /app/images/sdcard-$${BOARD_NAME}.img"
-  
+
   rpi0w:
     <<: *generate_image
     environment:
@@ -24,7 +22,7 @@ services:
     <<: *generate_image
     environment:
       - BOARD_NAME=raspberrypizero2w
-  
+
   rpi3a:
     <<: *generate_image
     environment: