update dockerfile (#4782)

- add moreutils for sponge command
- add sudo to use docker image as regular user

Dockerfile

@@ -46,6 +46,7 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
 		libunistring-dev \
 		lzip \
 		mercurial \
+		moreutils \
 		ncurses-dev \
 		ninja-build \
 		php \
@@ -55,13 +56,17 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
 		rename \
 		scons \
 		subversion \
+		sudo \
 		swig \
 		texinfo \
 		unzip \
 		xmlto \
 		zlib1g-dev && \
 	apt-get clean && \
-	rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+	rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* && \
+	adduser --disabled-password --gecos '' user && \
+	adduser user sudo && \
+	echo "%users ALL=(ALL:ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/users
 
 # Install setuptools, wheel and pip for Python3
 RUN wget https://bootstrap.pypa.io/get-pip.py -O - | python3

README.rst

@@ -1,7 +1,7 @@
 DSM 7
 =====
 
-DSM 7 was release on June 29 2021 as Version 7.0.41890.
+DSM 7 was released on June 29 2021 as Version 7.0.41890.
 
 
 In SynoCommunity some packages are available for DSM 7 but some are not.
@@ -72,7 +72,7 @@ A virtual machine based on an 64-bit version of Debian 10 stable OS is recommend
 
     sudo dpkg --add-architecture i386 && sudo apt-get update
     sudo apt update
-    sudo apt install autoconf-archive autogen automake bc bison build-essential check cmake curl cython debootstrap ed expect fakeroot flex g++-multilib gawk gettext git gperf imagemagick intltool jq libbz2-dev libc6-i386 libcppunit-dev libffi-dev libgc-dev libgmp3-dev libltdl-dev libmount-dev libncurses-dev libpcre3-dev libssl-dev libtool libunistring-dev lzip mercurial ncurses-dev ninja-build php pkg-config python3 python3-distutils rename scons subversion swig texinfo unzip xmlto zlib1g-dev
+    sudo apt install autoconf-archive autogen automake bc bison build-essential check cmake curl cython debootstrap ed expect fakeroot flex g++-multilib gawk gettext git gperf imagemagick intltool jq libbz2-dev libc6-i386 libcppunit-dev libffi-dev libgc-dev libgmp3-dev libltdl-dev libmount-dev libncurses-dev libpcre3-dev libssl-dev libtool libunistring-dev lzip mercurial moreutils ncurses-dev ninja-build php pkg-config python3 python3-distutils rename scons subversion sudo swig texinfo unzip xmlto zlib1g-dev
     wget https://bootstrap.pypa.io/pip/2.7/get-pip.py -O - | sudo python2
     sudo pip2 install wheel httpie
     wget https://bootstrap.pypa.io/get-pip.py -O - | sudo python3