Add development Dockerfile

* Development dockerfile builds from the current source directory
* Add instructions to build and use docker container

Dockerfile

@@ -12,10 +12,8 @@ RUN git clone --recursive https://github.com/avast-tl/retdec && \
 	cd retdec && \
 	mkdir build && \
 	cd build && \
-	cmake .. -DCMAKE_INSTALL_PREFIX=/home/retdec/retdec-install && \
-	make && \
+	cmake .. -DCMAKE_INSTALL_PREFIX=/home/retdec/install && \
+	make -j$(nproc) && \
 	make install
 
-ENV PATH /home/retdec/retdec-install/bin:$PATH
-
-CMD ["/bin/bash"]
+ENV PATH /home/retdec/install/bin:$PATH

Dockerfile.dev

@@ -0,0 +1,23 @@
+FROM ubuntu:bionic
+
+RUN useradd -m retdec
+WORKDIR /home/retdec
+ENV HOME /home/retdec
+
+RUN apt-get -y update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y build-essential git bc graphviz upx cmake python zlib1g-dev flex bison libtinfo-dev autoconf pkg-config m4 libtool wget
+
+COPY . retdec
+RUN chown -R retdec:retdec retdec
+
+USER retdec
+
+RUN cd retdec && \
+    ls -alh && \
+    mkdir build && \
+    cd build && \
+    cmake .. -DCMAKE_INSTALL_PREFIX=/home/retdec/install && \
+    make -j$(nproc) && \
+    make install
+
+ENV PATH /home/retdec/install/bin:$PATH

README.md

@@ -93,9 +93,64 @@ Currently, we support only Windows (7 or later), Linux and unofficially macOS.
 
 ## Build and Installation
 
+### Build in Docker
+
+#### Build image
+
+Building in Docker doesn't require installation of required libraries locally.
+This is a good option for trying out retdec without setting up the whole build toolchain.
+
+To build the retdec docker image, run
+
+```
+docker build -t retdec .
+```
+
+This builds the container from the master branch of this repository.
+
+To build the container using the local copy of the repository, fully clone the repository:
+
+```
+git submodule update --init --recursive
+```
+
+Then build the container using the development Dockerfile, `Dockerfile.dev`:
+
+```
+docker build -t retdec:dev . -f Dockerfile.dev
+```
+
+#### Run container
+
+To decompile a binary, create a container to upload the binary to:
+
+```
+docker create --name retdec retdec
+```
+
+Upload the binary:
+
+```
+docker cp <file> retdec:/destination/path/of/binary
+```
+
+Run the decompiler:
+
+```
+docker run retdec decompile.sh /destination/path/of/binary
+```
+
+Copy output back to host:
+
+```
+docker cp retdec:/destination/path/of/binary.c /path/to/save/file
+```
+
+### Build and install locally
+
 This section describes a manual build and installation of RetDec.
 
-### Requirements
+#### Requirements
 
 #### Linux
 
@@ -140,7 +195,7 @@ sudo dnf install git cmake make gcc gcc-c++ perl python3 bash zlib-devel flex bi
   * [wget](https://www.gnu.org/software/wget/)
   * [Python](https://www.python.org/) (version >= 3.4, macOS has 2.7)
 
-### Process
+#### Process
 
 **Warning: Currently, RetDec has to be installed into a clean, dedicated directory. Do NOT install it into `/usr`, `/usr/local`, etc. because our build system is not yet ready for system-wide installations. So, when running `cmake`, always set `-DCMAKE_INSTALL_PREFIX=<path>` to a directory that will be used just by RetDec. For more details, see [#12](https://github.com/avast-tl/retdec/issues/12).**