Remove the "build" user

GitHub Actions disallows the use of USER instruction.

Signed-off-by: Pavel Hübner <pavel.hubner@hardwario.com>

Dockerfile

@@ -1,9 +1,6 @@
 # Dockerfile for nRF Connect SDK v2.2.0
 FROM ubuntu:22.04
 
-# Add user (and group) "build"
-RUN useradd -ms /bin/bash build
-
 # Install "openssh-client" + "unzip" packages
 RUN DEBIAN_FRONTEND=noninteractive apt-get -qy update \
     && DEBIAN_FRONTEND=noninteractive apt-get -qy install openssh-client unzip \
@@ -18,19 +15,10 @@ RUN DEBIAN_FRONTEND=noninteractive apt-get -qy update \
     make gcc gcc-multilib g++-multilib libsdl2-dev libmagic1 \
     && rm -rf /var/lib/apt/lists/*
 
-# Switch to user "build"
-USER build
-
-# Set working directory
-WORKDIR /home/build
-
-# Create "~/.local/opt" directory
-RUN mkdir -m 700 -p ~/.local/opt
-
 # Download GN tool
 RUN wget --no-hsts --no-verbose -O gn.zip \
     https://chrome-infra-packages.appspot.com/dl/gn/gn/linux-amd64/+/latest \
-    && unzip gn.zip -d ~/.local/opt/gn \
+    && unzip gn.zip -d /opt/gn \
     && rm gn.zip
 
 # Set up Zephyr SDK (toolchain)
@@ -39,9 +27,9 @@ RUN wget --no-hsts --no-verbose \
     && wget --no-hsts --no-verbose -O - \
     /~https://github.com/zephyrproject-rtos/sdk-ng/releases/download/v0.15.1/sha256.sum \
     | shasum --check --ignore-missing \
-    && tar xf zephyr-sdk-0.15.1_linux-x86_64.tar.gz -C ~/.local/opt \
+    && tar xf zephyr-sdk-0.15.1_linux-x86_64.tar.gz -C /opt \
     && rm zephyr-sdk-0.15.1_linux-x86_64.tar.gz \
-    && ~/.local/opt/zephyr-sdk-0.15.1/setup.sh -c -h -t all
+    && /opt/zephyr-sdk-0.15.1/setup.sh -c -h -t all
 
 # Install required Python packages
 # Source: https://raw.githubusercontent.com/nrfconnect/sdk-nrf/v2.2.0/west.yml
@@ -52,12 +40,9 @@ RUN pip3 install --user --no-cache-dir --no-warn-script-location -r \
     && pip3 install --user --no-cache-dir --no-warn-script-location -r \
     https://raw.githubusercontent.com/nrfconnect/sdk-mcuboot/v1.9.99-ncs3/scripts/requirements.txt
 
-# Create "workspace" directory
-RUN mkdir workspace
-
-# Use "workspace" as working directory
-WORKDIR /home/build/workspace
+# Set working directory
+WORKDIR /build
 
 # Set environmental variables
-ENV PATH=/home/build/.local/bin:/home/build/.local/opt/gn:$PATH
-ENV ZEPHYR_SDK_INSTALL_DIR=/home/build/opt
+ENV PATH=/root/.local/bin:/opt/gn:$PATH
+ENV ZEPHYR_SDK_INSTALL_DIR=/opt

README.md

@@ -25,7 +25,7 @@ docker build -t hardwario/nrf-connect-sdk-build:v2.2.0 .
 For more convenient usage, we recommended adding this alias to your shell:
 
 ```
-alias dwest="docker run --rm -it -v `pwd`:/home/build/workspace hardwario/nrf-connect-sdk-build:v2.2.0 west"
+alias dwest="docker run --rm -it -v `pwd`:/build hardwario/nrf-connect-sdk-build:v2.2.0 west"
 ```
 
 Reload your shell environment and test the functionality: