doc: updated readme

README.md

 # Knot DNS Resolver
 
-## Preparation
+[![Build Status](https://travis-ci.org/CZNIC-Labs/knot-resolver.svg?branch=master)](https://travis-ci.org/CZNIC-Labs/knot-resolver)
 
-The Knot DNS Resolver depends on the Knot DNS library which is introduced in current master, and on the
-reasonably recent version of the `libuv`.
+The Knot DNS Resolver is a minimalistic caching resolver implementation. The project provides both a resolver
+library and a small daemon. Modular architecture of the library keeps the core tiny and efficient, and provides
+a state-machine like API for extensions. There are three built-in modules: *iterator*, *cache* and *stats*,
+but each module can be flipped on and off.
 
-### libuv
+### Try it out?
 
-If the libuv with a version at least 1.0 is not present on your system,
-compile and install the sources code from the Git repository.
+The Knot DNS Resolver is currently in an early development phase, you shouldn't put it in the production right away.
+
+### Docker image
+
+This is simple and doesn't require any dependencies or system modifications, just run:
 
 ```
-$ git clone https://github.com/libuv/libuv.git
-$ cd libuv
-$ ./autogen.sh
-$ make && make install
+$ docker run cznic/knot-resolver
 ```
 
-## Compilation
+See the build page https://registry.hub.docker.com/u/cznic/knot-resolver for more information and options.
+You can hack on the container by changing the container entrypoint to shell like:
+
+```
+$ docker run -it --entrypoint=/bin/bash cznic/knot-resolver
+```
+
+### Building from sources 
+
+The Knot DNS Resolver depends on the development version of the Knot DNS library, and a reasonably recent version of `libuv`.
+Several dependencies may not be in the packages yet, the script pulls and installs all dependencies in a chroot.
 
 ```
-$ export PKG_CONFIG_PATH="..." # Change, if you installed the libknot somewhere else
-$ ./configure
+$ FAKEROOT="/tmp/resolver-depends"
+$ ./scripts/build-depends.sh ${FAKEROOT} 
+$ export LDFLAGS="-L${FAKEROOT}/lib"
+$ export PKG_CONFIG_PATH="${FAKEROOT}/lib/pkgconfig"
+$ ./configure --enable-integration-tests
 $ autoreconf -if
 $ make
+$ make check
 ```
 
-## Running
+### Running
 
 There is a separate resolver library in the `lib` directory, and a minimalistic daemon in
 the `daemon` directory. The daemon accepts a few CLI parameters, and there's no support for configuration