TLDR-455 update installation instructions

README.md

@@ -59,19 +59,20 @@ Start `dedoc` on the port `1231`:
 docker-compose up --build
 ```
 
-Start Dedoc with tests:
+Start Dedoc with tests ([Install instruction using docker](https://dedoc.readthedocs.io/en/latest/getting_started/installation.html#install-and-run-dedoc-using-docker)):
  ```bash
 test="true" docker-compose up --build
  ```
 
 Now you can go to the `localhost:1231` and look at the docs and examples.
 ### Option: You can change the port of service:
 you need to change environment DOCREADER_PORT
-1. For local service launching on your_port (1166 example): 
+
+1. For local service launching on your_port (1166 example). [Install instruction from sources](https://dedoc.readthedocs.io/en/latest/getting_started/installation.html#install-and-run-dedoc-from-sources) and launch with environment: 
 ```bash
-export DOCREADER_PORT=1166 
-python dedoc/main.py -c ./dedoc/config.py
+DOCREADER_PORT=1166 python dedoc/main.py -c ./dedoc/config.py
 ```
+
 2. For service launching in docker-container you need to change port value in DOCREADER_PORT env and field 'ports' in docker-compose.yml file:
 ```yaml
     ...
@@ -90,7 +91,7 @@ python dedoc/main.py -c ./dedoc/config.py
 
 ## Install dedoc using pip
 
-One can install the dedoc library via `pip`. 
+One can install the dedoc library via `pip` ([Install dedoc using pip](https://dedoc.readthedocs.io/en/latest/getting_started/installation.html#install-dedoc-using-pip))
 To fulfil all the library requirements, you should have `torch~=1.11.0` and `torchvision~=0.12.0` installed. 
 You can install suitable for you versions of these libraries and install dedoc using `pip` command:
 

docs/source/getting_started/installation.rst

@@ -59,20 +59,25 @@ Install dedoc using pip
 If you don't want to use docker for running the application, it's possible to run dedoc locally.
 However, it isn't suitable for any operating system (Ubuntu 20+ is recommended) and
 there may be not enough machine's resources for its work.
-You should have `python` (python3.8+ is recommended) and `pip` installed.
+You should have `python` (python3.8, python3.9 are recommended) and `pip` installed.
 
+.. _install_packages:
 
-1. Install `libreoffice` and `djvulibre-bin` packages:
+1. Install necessary packages:
+******************************
 
   .. code-block:: bash
 
-    sudo apt-get install -y libreoffice djvulibre-bin
+    sudo apt-get install -y libreoffice djvulibre-bin unzip unrar
 
-These packages are used by converters (doc, odt to docx; xls, ods to xlsx; ppt, odp to pptx; djvu to pdf).
+`libreoffice` and `djvulibre-bin` packages are used by converters (doc, odt to docx; xls, ods to xlsx; ppt, odp to pptx; djvu to pdf).
 If you don't need converters, you can skip this step.
+`unzip` and `unrar` packages are used in the process of extracting archives.
 
+.. _install_tesseract:
 
 2. Install `Tesseract OCR 5` framework.
+***************************************
 You can try any tutorial for this purpose or look `here <https://github.com/ispras/dedockerfiles/blob/master/dedoc_p3.9_base.Dockerfile>`_
 to get the example of Tesseract installing for dedoc container or use next commands for building Tesseract OCR 5 from sources:
 
@@ -89,14 +94,17 @@ to get the example of Tesseract installing for dedoc container or use next comma
 
     .. code-block:: bash
 
-    sudo add-apt-repository -y ppa:alex-p/tesseract-ocr-devel
-    sudo apt-get update --allow-releaseinfo-change
-    sudo apt-get install -y tesseract-ocr tesseract-ocr-rus
-    git clone --depth 1 --branch 5.0.0-beta-20210916 https://github.com/tesseract-ocr/tesseract/
-    cd tesseract && ./autogen.sh && sudo ./configure && sudo make && sudo make install && sudo ldconfig && cd ..
-    export TESSDATA_PREFIX=/usr/share/tesseract-ocr/5/tessdata/
+       sudo add-apt-repository -y ppa:alex-p/tesseract-ocr-devel
+       sudo apt-get update --allow-releaseinfo-change
+       sudo apt-get install -y tesseract-ocr tesseract-ocr-rus
+       git clone --depth 1 --branch 5.0.0-beta-20210916 https://github.com/tesseract-ocr/tesseract/
+       cd tesseract && ./autogen.sh && sudo ./configure && sudo make && sudo make install && sudo ldconfig && cd ..
+       export TESSDATA_PREFIX=/usr/share/tesseract-ocr/5/tessdata/
+
+.. _install_library_via_pip:
 
 3. Install the dedoc library via pip.
+*************************************
 To fulfil all the library requirements, you should have `torch~=1.11.0` and `torchvision~=0.12.0` installed.
 You can install suitable for you versions of these libraries and install dedoc using pip command:
 
@@ -109,3 +117,43 @@ Or you can install dedoc with torch and torchvision included:
   .. code-block:: bash
 
     pip install "dedoc[torch]"
+
+Install and run dedoc from sources
+----------------------------------
+
+If you want to run dedoc as a service from sources. it's possible to run dedoc locally.
+However, it isn't suitable for any operating system (Ubuntu 20+ is recommended) and
+there may be not enough machine's resources for its work.
+You should have `python` (python3.8, python3.9 are recommended) and `pip` installed.
+
+1. Install necessary packages: according to instructions :ref:`install_packages`
+
+2. Build Tesseract from sources according to instructions :ref:`install_tesseract`
+
+3. We recommend to install python's virtual environment (for example, via `virtualenvwrapper`)
+
+Below are the instructions for installing the package `virtualenvwrapper`:
+
+  .. code-block:: bash
+
+    sudo pip3 install virtualenv virtualenvwrapper
+    mkdir ~/.virtualenvs
+    export WORKON_HOME=~/.virtualenvs
+    echo "export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3.8" >> ~/.bashrc
+    echo ". /usr/local/bin/virtualenvwrapper.sh" >> ~/.bashrc
+    source ~/.bashrc
+    mkvirtualenv dedoc_env
+
+4. Install python's requirements and launch dedoc service on default port `1231`:
+
+  .. code-block:: bash
+
+    # clone dedoc project
+    git clone https://github.com/ispras/dedoc.git
+    cd dedoc
+    # check on your's python environment
+    workon dedoc_env
+    export PYTHONPATH=$PYTHONPATH:$(pwd)
+    pip install -r requirements.txt
+    pip install torch=1.11.0 torchvision==0.12.0 -f https://download.pytorch.org/whl/torch_stable.html
+    python dedoc/main.py -c ./dedoc/config.py