better installation instructions

README.md

@@ -19,13 +19,50 @@ The build uses [CMake](https://cmake.org). Additionally, you need the following
     Refer to the corresponding pages for installation instructions. On Linux distributions, readline is probably already installed.
 
 Note that the libraries are all FOSS software and GPL-compatible.
+For installation help, see below.
 
-Now, building the project is quite easy:
+Now, building the project is quite easy (this assumes you have installed above libraries system-wide):
 ```
 cmake -DCMAKE_BUILD_TYPE=RELEASE .    // Release build recommended for performance, unless you want to develop
 make                                  // Rerun this every time you change sources
 ```
 
+### Installing the libraries
+I can't provide information for all distributions, but in general it should be like the following:
+
+Linux systems:
+- `boost` should be available as a system package via your package manager.
+- `readline` should be installed already, otherwise try your package manager as well.
+- `cpr` is a bit more complicated:
+    - On Arch, there is a package in the [AUR](https://aur.archlinux.org/packages/cpr).
+    - On Fedora, there is also a package via [rpm][https://src.fedoraproject.org/rpms/cpr].
+    - There might be packages for other distributions, check out the [CPR project on Github](https://github.com/libcpr/cpr#packages-for-linux-distributions).
+    - If there is no package available for your distribution, see [below](# Installing cpr as a local CMAKE dependency)
+
+Mac OS:
+- I recommend installing packages with [Homebrew](https://brew.sh).
+- So `brew install boost cpr readline` should do the job.
+
+Windows:
+- Currently, I have no idea regarding windows, sorry for that.
+
+### Installing cpr as a local CMAKE dependency
+- There is also the option to install `cpr` directly as a dependency through `CMake`.
+    For this, replace the line
+    ```
+    find_package(cpr)
+    ```
+    with the lines
+    ```
+include(FetchContent)
+FetchContent_Declare(cpr GIT_REPOSITORY https://github.com/libcpr/cpr.git
+                         GIT_TAG 2553fc41450301cd09a9271c8d2c3e0cf3546b73)
+FetchContent_MakeAvailable(cpr)
+    ```
+    where you replace the git tag with the latest release tag from [Github](https://github.com/libcpr/cpr/releases).
+    You can find details on this installation method on the [cpr github page](https://github.com/lipcpr/cpr) as well.
+
+
 ## Usage
 ```
 # ./endgame-analyzer (GAME_ID | GAME_FILE) TURN